Is it no harm to replace with capacitor without ripple current rating?

[chth96]

When I tried to repair LG 29 inch CRT TV, I found that the ESR value of samyoung SMS capacitor(160v 2.2uf), which is very close to D1879 transistor, is 6 ohm.

[ATTACH=JSON]{"alt":"Click image for larger version Name:\tIMG-1100.jpg Views:\t0 Size:\t100.2 KB ID:\t3255736","data-align":"none","data-attachmentid":"3255736","data-size":"full","title":"IMG-1100.jpg"}[/ATTACH]
Judging from above ESR Meter Table,I think It is necessary to replace this sms capacitor.So I visited local...

[aminsab]

hello, i need bios of Thinkpad L14 gen 2 please.

Thank You...

[mixtape87]

[INDENT]Hey everybody, got that specific notebook, bought it second hand. There was no ssd inside I placed the new ssd and tried to start the laptop but the only thing I get when I start up is a black screen and the keyboard is lighted up and changes the colors. No fan spinning ( but the downside is getting warm so the cpu is working I guess) and the led for charging the battery is on. Can't boot into the bios via f2. It's now looking like I bought a brick and got scammed.. can anybody help me out with this problem please?[/INDENT]

...

[mr.Data]

Hello,

This Macbook Pro 2018 boots up and then gets stuck on the logo.
All the normal methods of resetting this Macbook have been tried but do not work.
I cannot get into recovery mode and there is no bar displaying, it's just the white logo on a black background.

Any help would be greatly appriciated....

[jheunne]

hi there i have a lenovo k14 gen 1 i installed clean windows 11 but it ask for company account like microsoft acount i tried to skip but i end up on still asking for company cognizant account. is there a way to unlink or unbind this account on the unit? thank you.

[cihanpc]

I NEED OEM CHINA MOTHERBOARD X79-VG3 VER 2.2 H61 CHIPSET BIOS URGENTLY..
FANS TURN ON FOR 3 SECONDS AND RESET CONTINUOUSLY....

...

[Satdude]

Hi, I have a Yamaha RX-497 receiver, and one day I came home to a burnt smell and the breaker was tripped. Upon opening the receiver, I saw extreme damage to the main power board. C254 was exploded, R261 was burnt, D255 was shorted, Q254 is open circuit, D261 (bridge rectifier) is also open, traces to IC252 (TC4013BP) are vaporized right off the board. Not sure about any other damage, I'll have to desolder the flip flop to test it. Also the transformer T251 is getting hot when plugged in. What could have caused such extreme damage just sitting plugged in? Only repair that was done in the past...

[aminsab]

Hello,

i need Bios for Mi Gaming laptop core i5 G7

The laptop turn on and screen stay black not booting ( sometimes goes to li logo and freeze)

Thanks...

[r2digital]

I have a klipsch kda-500 that would turn on and allow me to get into the web management but it was picking up a lot of noise from audio sources so i decided to replace the smd caps on the power supply along with radial one. Some one was in here before me and they basically burned the bottom side of the traces off for the radial cap but i was able to repair it without any real problem. I thought i did a good job sourcing out replacement caps but apparently not and now i can't get the power supply to turn on it just constantly try's to keep turning on. Attached is a picture of the power supply before...

[Bholu]

Hello friends, I have MTC 58' TV which has stand by position. I thought the software was corrupt. I have downloaded the software from the internet but the data is not matching. The format window is opening from the TV software but none of the buttons on the remote or TV are working. Why? Can I edit this software with a hex editor? Is there any guide to edit this? Or does anyone have access to this software? Thank you very much for your help.


model no.---'[Mtc4k58s21]
panel---D58-M30...

[aaronkatrini]

Hi all,

Recently picked up this GTX1650 at a local flea market for a low price and wanted to use it on my secondary PC. I first tested the card and saw the fan spin for a split second and then nothing. Immediately I thought of a short circuit. Disassembled and found a shorted SMD capacitor, injected voltage into it (1V/4A) and two Mosfets got hot immediately (QN3103 & QN3107). Desoldered these Mosfets and the card turned back to life.

Bought replacements from Aliexpress and replaced them afterwards. Tried the card but still the saw the fan spin for a split second...

[karlox]

Good morning, can someone share with me a copy of a working BIOS for this computer? I downloaded them from the hp page, but it is not working for me, I attach a copy of the backup of this card. The worst thing is that it's working for me, I have a suspicion that I'll have to program the EC, the motherboard license plate is DA0P9MB26A0 REV. A


Computer Data Under Repair
HP Stream 14-ax113la
MB DA0P9MB26A0 Rev. A
SN# 5CD1495JDV
Celero N4020

The team went into the workshop because it didn't detect the battery, an error was found in a AON6380...

[edugimeno]

Hi everyone!
I have this board that suddenly stopped supplying power to an output that drives an interchanger cleaner motor.
I checked while the board was in place with all wires attached and there's no AC voltage on the corresponding plug X5
This X5 is driven by fuse F8 (tested OK) which comes from the second orange relay
To make sure there are no charcoaled contacts inside the relay, I got a 24VDC power supply and got it ready to manually power up the coil side of these relays.
I respected the polarity, positive to cathode of protecting diode
So provided all...

[bigboots]

As the title says. Can anyone please help identify this ic.
Kind regards.AGRN16957...

[Pelayo García Bárcena]

Hello everyone, I need the schematic for the MSI Modern 14 BM4W.

Thank you very much in advance

[Flaku_34]

[FONT=Calibri]Introduction:[/FONT]
[FONT=Calibri]Hello everyone, this topic is more of a knowledge sharing and look inside type of post, but for someone working on this model of display it might be useful. Recently I bought Acer Nitro XV273 XB MIIPRZX with busted electronic, but screen was intact, price was incredibly low, so I took a gamble and bought the unit and try to fix it. As I dug inside, I found out that my motherboard was not responding, although all voltages seemed fine. I wasn't able to find any reliable information about this monitor on the web (only some pictures of motherboards...

[tommy97]

Hi,

We are having problem with HP omen [B]HP 15-dh1005na[/B] Motherboard:GPC54 LA-J662P Rev 1.0 laptop randomly restarts, and it did not charge battery. PQB01 we're blown replaced, laptop charging only while laptop is off. While the laptop is ON in windows, we're getting a message that charger wattage is incorrect, and it does not have a charging light at all. Tried on 180w, 120w and lab PSU, no change, while it's off it does charge on any charger.
PQB 1&2 S&D 19.5v, G 24v.

The laptop does not power on while battery disconnected, only show white light on...

[Keshenatech1]

Does anyone have a schematic or parts list for a ZWS150BAF-12 12V power supply? I have a dead one and I've determined the surface mount diode on the back side of the board that connects from the center leg of Q3 to the + side of the 420V 60uf capacitors has a 3.5 ohm short. I'm not having much luck trying to identify the diode as the part number is not very legible. In the attached picture, it's the black rectangular diode in the center. There are some numbers on it but I can't even tell if it's right side up or upside down. The picture is from a 2nd good working unit which is more legible...

[ladharimohamed2]

I need bios for toshiba satellite pro r50-b-15j motherboard faebsy2
i have tried this :

but no power
and i tried this



the laptop worked but asked for a password
i have tried many with same motherboard name wich is FAEBSY2 A5A003954010 A but the laptop didnt turn on (no lights, no fan spinning)
i have attached my original bios wich has been corrupted after a windows update (turn on but black screen)
if any have the bios for the exact model name will be great "toshiba satellite pro r50-b-15j"...

[limpidity]

Please let me know the resistance value shown in the picture...


If you have a circuit diagram, please share it......

[emaghanim]

[URL="https://www.badcaps.net/filedata/fetch?id=3255112"]Lenovo X1 Carbon NM-B481 me cl.rar[/URL]
Pls help me change the Thunderbolt option in setup to be disabled as defualt or permanent disable[URL="https://www.badcaps.net/filedata/fetch?id=3255112"]Lenovo X1 Carbon NM-B481 me cl.rar[/URL]
Pls help me change the Thunderbolt option in setup to be disabled as defualt or permanent disable...

[totto210]

hey guys, need this pls [URL="https://www.ecs.com.tw/ls/Product/Motherboard/H510H6-M2/overview"]H510H6-M2[/URL]
[url]https://www.ecs.com.tw/ls/Product/Motherboard/H510H6-M2/download[/url]
the one in site is for upgrade hey guys, need this pls [URL="https://www.ecs.com.tw/ls/Product/Motherboard/H510H6-M2/overview"]H510H6-M2[/URL]
[url]https://www.ecs.com.tw/ls/Product/Motherboard/H510H6-M2/download[/url]
the one in site is for upgrade hey guys, need this pls [URL="https://www.ecs.com.tw/ls/Product/Motherboard/H510H6-M2/overview"]H510H6-M2[/URL]

[timematcher]

Dear friends,

I am in need of the schematic diagram for [B]DAX32DMAD0[/B] HP Spectre X360 [B]15-BL112DX[/B] (8th generation)



[ATTACH=JSON]{"alt":"Click image for larger version Name:\timage_2024-04-18_050809732.png Views:\t0 Size:\t2.02 MB ID:\t3255091","data-align":"none","data-attachmentid":"3255091","data-size":"full","title":"image_2024-04-18_050809732.png"}[/ATTACH]

ThanksDear friends,

I am in need of the schematic diagram for...

[Kambi13]

Hi all, need some help, I've got a Lenovo V14-IIL that as total of 8GB of RAM (4GB onBoard - 4GB Sloted), out of the blue it stopped posting, After investigating, found out that removing the RAM stick from the slot, the laptop would post and work with no other issues. So tried with a different RAM stick suspecting that the original one somehow died, but to my frustration the issue remained, so again tried a different number of known working RAM sticks with different capacities and speeds but with no avail.... Unplugged Battery, removed CMOS battery,Reset and Updated Bios, also measured voltages...

[chaos-theory]

I have a card that does post at all, the owner said it does go into windows but it gets stuck on the logo with artifacts, I have no idea if he is lying or not... I tried the card on my pc and it does not post at, no beeps, no bios nothing just all fans turning and nothing else. I tried plugging DVI or hdmi but nothing, I tried unplugging the 8 pin plug from the power supply and it's the same thing.
I just want it to post and get into the bios at least.
Forgive me if I am wrong, but I tested the 3 PCIe 12v power pins on the left(550ohm) and the 4th one from the right 3.3v (400ohm),...

[chth96]

I usually tried to find datasheet which contains Maximum ESR value like KME datasheet.
[URL]https://www.westfloridacomponents.com/mm5/graphics/S06/KME250VB10RM10X20LL.pdf[/URL]

As far as I know,Maximum ESR means boundary ESR value for bad capacitor.
But,In many case,there is no ESR value in datasheet like below links.
[URL="https://www.mediafire.com/file/fhe8h0x4fmblgzn/SAMWHA-RG_Series_.pdf/file"]SAMWHA-RG Series (mediafire.com)[/URL]
[URL="https://www.mediafire.com/file/wwiiluhtci0qxb0/samyoung_SMS_Series.pdf/file"]samyoung_SMS_Series...

[ktmmotocross]

Hello.
Have this Asus RTX2060S dual EVO that dont release core EN because THERM_OVERT* from core is put to low. Anybody knows what triggered this event?
i have some other cards that do the same so i need to realize why

[hemant_2222]

Hello Friends,

Greetings!

I have taken this active subwoofer from Wharfedale for restoration. This is already in a bad shape as far as the connections goes. It has already been worked by local technicians. The most important part that I am looking forward is the schematic diagram, as there is jumper placed and a track has been cut, as if to bypass the actual connection. I am not sure if this is by design or someone has tried something to achieve.

Another thing is the TDA7294 was badly treated with its legs cut and it had a crack too, so I have replaced it...

[Nash1405]

Have you found the issue? I might also have a very similar issue with A2338, the battery charging sign comes up then the Apple logo comes up for 2-3 sec and shuts back down. can't able to find the issue. I am getting good readings all over the board. A little help would be nice. Thanks!...

[danito]

boardview...

[abajor]

I'm investigating the above mentioned Yoga 7. There's something causing it to loop in the power up phase. I can hear a ticking noise before my USB Digital Multi-meter resets.

I'm guessing it's a power mosfet? I'll update if I find anything, but if anybody experience, knowledge or info about this unit, it will be much appreciated. Thanks.

[dimondimonich]

Hi guys! We need a bios dump.
Model Legion 9000 PRO 8 (2023)
s/n PF4T63Y1
I downloaded the bios on the official Lenovo website
It is not possible to fill it with a programmer on a flash drive
In the original flash drive, the file weight is 2 MB.
Please help me)

[wolf88]

Hello, I need the IMAC A1419 schematic - 820-01134-A with boardview

[crosswinds]

Hello,

So, pulled a motherboard out from storage, was working when put away, wont post when I took it out of storage today.
Since it was working, and it looks to be essentially time that killed it I figured its a good idea to replace the caps before digging further.
Looks to be only good quality caps on this board, so might not be the issue. But it is closing in on 20 years now so, wont hurt i guess

Its a ASUS P5VDZ-MX board.

I would really appreciate some assistance on what the best replacement caps would be for these:

Panasonic(M)...

[ub6ib969]

Hi, unit will power on and displays the HP splash screen and gets stuck. Tried F10, ESC to get to the BIOS however the CAPS LOCK key flashes 5 long and 4 short. I have attached the information below if anyone can assist. Thanks in advance.

[B]Model[/B]
HP Pavilion - 15-cs0015nia
[B]Product[/B]
4XL67EA#BH5
[B]Serial[/B]
5CD83574CD
[B]Motherboard[/B]
DAG7BMB16E0 REV:EHi, unit will power on and displays the HP splash screen and gets stuck. Tried F10, ESC to get to the BIOS however the CAPS LOCK key flashes 5 long and 4 short. I have attached...

[stinger]

When I turn tv on, the backlights come on but there is no sound or picture. I have read that these tv's have problems with the panels going bad but the "no sound" has me questioning if the main board is bad. Is there a way to troubleshoot the main board to determine if that is the problem?

[Anas Ahmed (MicroMummy)]

BIOS for HP z210 Workstation.. Request Thank
serial motherboard : 614491-002 REC0G
PCCJE0GCY0U20A
[ATTACH=JSON]{"alt":"Click image for larger version Name:\tz3210.jpg Views:\t0 Size:\t168.4 KB ID:\t3254724","data-align":"none","data-attachmentid":"3254724","data-size":"custom","height":"368","title":"z3210.jpg","width":"495"}[/ATTACH]...

[reassor]

Hi.
I got dead one.
3VALW is just pulsing then goes down. i removed the jumper PJ402 and it suddenly stays up but PG pin on that IC is around 0.5v and droping.
There is no obvious shorts. Wierd thing is that on the other side of the PJ402 i have 1.4V from somwhere ...

Injecting 3.3v there draws 300mA and nothing is heating up.

the ic is SY8386BRHC_QFN16 (kinda uncommon here - so i do not have a spare to test it)

any ideas to check before i order a few of these?

[petehall347]

have been looking at earth leakage clamp meters and its like a minefield out there . i wondered if anyone here had bought one that actually works properly ?...

[mabinternet001]

Hi, I need help to identify the component with marking "9003 KAUCHB".

A bit of background...
I have an induction hotplate UNOLD Elegance Typ no. 58105 (with board CHK-A1.42S) which has a blown resistor.
I have also located the problem in the SOT23-6 component with the marking "9003 KAUCHB"; the pin 5 was disconnected from the IGBT emitter (ground) due to the high temperature and this caused the IGBT to be permanently ON.
I replaced the resistor and resoldered pin 5 of the SOT23-6 component to the IGBT, the hotplate worked for about a month and...

[AdrenalinTL]

Hi,

Very new to this. So pretty basic / silly question. Can this be the cause of a totally dead mobo? And, is it repairable if I bridge tracks etc?

Thanks

[zwect]

I recently got this laptop on a trade labeled for parts, when first testing it, the motherboard starts on, the power LED stays on while the gpu and cpu fans ramp up in different speeds, then it turns off after half a minute or so.
No flashes from the LED daughterboard that indicates battery and HDD, but the battery seems perfect and even charges if plugged (with it's LED on accordingly).
BIOS and EC were reflashed, did a clean ME already, no change in symptom but then i noticed 3 things while looking through the board:

PU5 (NB671LGQ-Z) was burnt in one of the pins, i swapped...

[lofton]

Hello, I was flashing the bios but now the machine does not come, the battery indicator turns orange when charge is plugged in. As soon as it plugged by charger or battery the power button and escape blinks once then fade out Sometime it blinks 3 timess . With the back case off i can see the fan spins a little then top, but once i press the button it spins a little then stop and repeat for a while until stops. I have attached the bios dump. I had read the chip next to the cmos battery (25q80jvsiq) then i realize that it wasn't the bios. as the bios is next the memory slot. By doing that could...

[StormCrow]

Hi folks
Got a 14-eb0013na here that won't boot - have attached original BIOS dump
Serial number: 5CD203HPS8

I wonder if anyone could sort this for me so I can re-flash?

Also interesting in learning how to do it myself, is it the ME region that needs clearing on the HP laptops?

Many thanks...

[chth96]

Hello.
I have 29inch LG CRT TV,And Yesterday,Whenever I connect AC power cord to power outlet without switch on, I heard a sound like white noise, And When I switched on this CRT TV, It sometime displayed correctly But usually It won't last more than 20 minute and The screen begin to dark and It finally did not display at all for hours..
Today,I dismantled its plastic case and discharged the biggest capacitor(400wv 470uf) which still holds 250 voltage,and I finally detached PCB from cathode-ray tube.
I measured ESR value of most of caps in PCB with MESR-100 and I found that KME(25v...

[vinzmt]

hi to all
i have this logic board with no back light, image is present.
unknow istory.

on q7707 pin 5 EDP_BKLT_EN found 3.3 v, pin 1 gnd damage, pin 2 BKLT_PLT_RST_L only 0.08v (but is 3.3 on r2088 pin 2)
remove q7707 and find this

any suggestions?
thanks...

[norbiszoke]

Hello,

We have this set here in our shop that is not ginving sign of life besides red light that is blinking one time after pressing the button and nothing more... After detaching the mainboard from the PSU (this set has separate board thank god?! or not...) the backlight comes on. After reattaching nothing besides red light.... Can anyone from the forum help me here? Thank you in advance. Here's a link with images of the mainboard and the memory IC's that are on it.


Regards, Norbert!...

[hasefroch]

Hello everyone, I got this notebook, mainboard SKITTL10-6050A273001-MB-A1

Saw the U6100 blown up, so didn't even try to power it up.
Sems that there is not a schematic or boardview of this one, so I attached some pictures (some look distorted; the ic looks like a qfn-16 3x3).
Maybe is the RT2790A; looks to me compatible but their product code is 3B= XX and mine is 38=
Hope someone knows this one.
Thanks in advance.

[sretchko]

[FONT=Arial]Hey fellow solder fume lovers, I have a Vintage Sony Receiver STR-4800 SD that has me stumped. [/FONT]
[FONT=Arial]The Balance Pot has to be set at about 30 degrees (11 o'clock) to the left for the output to be balanced (see photo). I'm using an oscope, sig gen 1kHz sine, 8 ohm dummy load).[/FONT]

[FONT=Arial]When output is balanced (11 o'clock left) both channels clip at about 19 vac / 45 watts RMS, Amp is rated at 35 watts so I know the amp modules are good. Square wave also looks good when turning bass & treble pots and is in phase. [/FONT]

[FONT=Arial]I...

[magistertc]

Kitchen Aid Superba KUDS series, installed 2001, similar/identical to Whirlpool -- live, but no Start and no response to button-press.

The reset sequence of pressing two buttons multiple times did not work, either. Cycled power, no go.
Power off, remove six screws (torx 7 heads) examine circuit board: Saw two 63V/100uf caps, two more 10V caps, all appeared normal. Mutiple color-coded wires to board,
got all disconnected, dismounted board from housing. ESR test showed that 63V caps had failed.
Jamicon 105 C TK series, 8D x 12. Replaced both with equivalent ...

[jimmy2022]

schematic required for lenovo 13acn5

yoga 7 series...

[fredyjbi]

please help friends x1 yoga 7th no display beep melody thank you...

[fredyjbi]

please help friends clean me bios x1 yoga 7th no display melody beep, thank you

[Ancient1]

Hi
I received such Laptop as junk. Opening it I saw a lot of whitish water residue , but no corrosion really ( few coils have small brown rust marks, no green copper ).
I cleaned all thoroughly and interestingly , its the Battery BMS board that has the real corrosion spots.. under the protective clear Goo !!

[U]I want to try and power up the laptop [/U]

Battery is swollen. But I don't want to buy a new battery right now , of course .

I started work on the BMS by zooming in on green spots . 2 VIAs are filled with rusted copper goo - who...

[s_henya]

Hi got this cute GPU,
PC is powering on, GPU is getting power ~40deg
Cmos speaker is beeping.
other cards working fine on this build
tested the card on 2 other builds- same beep
visual inspection didn’t reveal any issues or missing components.

any test points?...

[r3yv12]

Hello Guys, I would like to ask for help to anyone that has a Schematic and Boardview of Asus GX650PY, Basically I messed up when I was cleaning the fans and heatsink of the Laptop and made some drop of Liquid Metal in the Board. It cause a short, I already located the precise location of the short through measuring the resistance of all Inductors, the problem is that I cannot push through without knowing the schematic/board view of the Laptop. Also, I can inject a power through the Main Power Rail and see with a thermal camera the short because the short is also on the Main Power Rail, but I...