Lenovo Z50-70 ACLUA/ACLUB NM-A273

[vpower]

Hi, I have this laptop, it is completely dead, no charging light when connected to a working charger.
Can anyone help me with some hints for troubleshooting this laptop?
Thanks in advance...

[rajnbb]

Hi guys can someone Help?
Dell XPS 9310
SN: J2H24F3
reg. Type: P117G002

Notebook is Stuck on DELL Logo, Blinking LED 3x Amber 6x White, Dell Website says ME Error

I dont know if this device has 2 Chips, if yes, could someone tell me where the second one is located?...

[SomnusDisney013]

Hi, I have an HP 600 G4 minitower computer. The BIOS was probably updated when the processor was replaced. The power went out and now the computer won't start.
Is it possible to rebuild? On another BIOS I get a 6 red 3 white or other signal...

[appie1206]

Hello there friends

Can someone Clear this bios file for me ?
serialnumber: 5CG33778XV
productid: 709Z1AV

Thanks in advance...

[NiroPall]

Hello friends,
Please share this schematic if you have,
EPK50 LA-G07EP REV: 2.0 (HP)

Thank you.

[ImpossibleRepairs]

Hi Good peoples;

Been working on a turtle beach Velocity one flight controller; The slide pot for the throttle (black) isn't calibrating properly, it will register the axis with some wriggle until pressure is released;

Does anyone know the specifics for these Potentiometers?? I have attached photos;

Board number is LBX-19500，
C-V1.1 202011

please and thanks as always

[Comp_Pro]

Hello all,

Am trying to figure out this backlight issue with this A1990 Macbook Pro.

Tests performed:

There is no backlight even with a good screen.
Backlight IC is receiving the correct support voltages.
Fuse F8400 ok
Current sense resistor R8400 ok
Backlight IC is receiving 3.3V on enable pin.
Backlight IC receiving voltage from PPBUS_G3H, aprox 12.5V.
Backlight IC receiving 5V from PP5V_G3S
Backlight IC BKLT_SCL and BKLT_SDA both measure 0.545V diode mode to ground
I2C_BKLT_SCL and I2C_BKLT_SDA both measure...

[fixxz]

Could you help me get the bios for this lenovo the card model is JS47A/JS57A/JS77A NM-E531 REV 1.0 I do not have the original file since the chip was damaged

[gjgib]

Hello, this might be embarassing since I consider it a dumb question but keeps me kinda stuck sometimes in my journey.

I want to know if there is any post in this forum which explains my questions. [B]A)[/B] [B]When, where and how do I know when X voltage line is input or output. Example: [/B]

[URL=filedata/fetch?id=3266119&d=1715040463][ATTACH=JSON]{"alt":"Click image for larger version Name:\timage.png Views:\t0 Size:\t151.9 KB ID:\t3266119","data-align":"none","data-attachmentid":"3266119","data-size":"thumb"}[/ATTACH][/URL]...

[techrefurbca]

Hi,

It is my first BIOS request here.
I have a bios-locked AUS M415D

ASUS X415DAP

[kk126]

Hello, I have a da0h9bmbcd0 card which had a liquid spill, there was an area in which corrosion damaged the power rails but it is almost undetectable to where they are connected, I looked for the schematic diagram of the equipment but it is not available so if you can help me I would appreciate help knowing which integrated part is the one that had the damage....

[PITERPENY]

there is no reaction, it hangs at 20 V/0A. There was a little corrosion in the u7650 area. Replacing the u7000 did not help. Tell me, what else could it be? PPBUS_G3H=12.9V
Flashing the bios with a clean region also did not work!

[atmega4]

please i need unlock BIOS unowhy Y13 2021
Production year : Aout 2021
Model : Y13G011S4EI
Motherboard : EM_IG116_200b_ene_F_V1.0...

[Mogli1476]

Hey @all,

my ipad Pro dont want to work anymore. I measured the incoming amps which is approx. 0.5A. Then I changed the Tristar IC and blow out some parts near this IC. Now I want to find the missing parts. Thats why i´m asking for the schematics & board view for this ipad pro.

Thank for your help!

Best regards, Mike

[spleenharvester]

I bought a T12-958 recently with an M8 handle and until now it has worked very well. The tip wasn't earthed but that was easily resolved.

Now, whenever it is switched on, it heats up to about 70*C then shows an [INVER] error on the screen and stops. In order to fix it I have to either unplug and re-plug the handle, or unplug and re-insert the tip from the handle. While doing that it changes to [ERROR], then it finishes heating up and works perfectly. Until it's turned off, after which it will show [INVER] again next time it is turned on.

Any idea what the problem is?

[babydoll8867]

Hi, i have a Dell 3681 SFF, with its original bios the led blinks 3,6 (some bios error). i tried with a clear me version from another site and it was ok, it gave image but entered manufacturing mode. tried entering service tag but it can't be saved and i can't exit manufacturing mode. can anyone help me with a fix for my original bios file? i attach it here, ST: 3FQ2SF3...

[EazyBone]

Shown in picture, trying to replace a MOSFET and looks like I knocked this off, in guessing it's the same as one next to it. Has 1.8 Mohms. Any way to bypass it? It's on the hot side

The component circled is the one there, the arrow is I think another of same component?

[fredyjbi]

Please help sir, this board does not turn on because VSYS_OUT is 9.2v, I compared it with a normal board VSYS_OUT is 10.2v, I have replaced the PQ101 and PQ102 mosfet and BQ 25700 which is known to be good, but the results are still the same, thank you

VSYS_OUT 9.2v
Meter in resistance mode auto range 6M ohm ok

NORMAL BOARD VSYS_OUT 10.2V


PQ101
PIN 2 20V
PIN 7 0.004V
PIN 6 6V
PIN 5678 0V

PQ102
PIN 567 0V
PIN 9 0.004V
PIN 234 9.2V (VSYS_OUT)

PU101 BQ25700ARSNR
1 VBUS 20V...

[rostomzerrougui]

i want to program a W25Q40CL chip but looks like it won't get erased neither programmed
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"image.png","data-attachmentid":3265889}[/ATTACH]
Any help ?i want to program a W25Q40CL chip but looks like it won't get erased neither programmed
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"image.png","data-attachmentid":3265889}[/ATTACH]
Any help ?...

[dansity]

Hello,
As a foreword I'm relatively novice with component level audio gear repair. My amplifier stopped producing sound and I currently have no funds to buy a new one so I need any help to repair it. I know "no sound" is one of the most common problem but there were other symptoms so some of you seasoned repairman might able to pinpoint the stuff I have to check. I did download the service manual from manualslib the "no sound checklist" is a bit intimidating.

So i bought it working. First symptom: speaker protection relays on the audio board were clicking...

[aaronkatrini]

Hi all,

I was looking to upgrade my main multimeter (Asita MD591) with something that has more features. I'll use it mostly for board diagnostic and diy repairs. I've been eyeing out many of those multi-function ones from Aliexpress but can't seem to make my mind up. Here are the features that I'm looking after:

- Autorange
- DC volts up to 30V
- Accurate Resistance
- Diode test (Beep mode)
- Frequency up to 200MHz
- Capacitanze up to 5000uF
- as cheap as possible

Other functions are not needed but those which are needed...

[Actionkindaguy]

MSI MEG Godlike x570 motherboard - need schematic and boardview. I have accidentally plugged in the wrong usb plug into a usb3.0 connector on front panel of PC resulting in temporarily shorting out the port. (I know it was really stupid, It was dark in my room and was rushing). I shutdown the computer and now after an immediate restart I get an overcurrent error on boot up saying my PC will shut down in 15 seconds. If I let the computer sit for about 35 minutes, I then can boot the PC without getting error. What I am hoping to find out is what parts were affected by my stupidity. Anyone have any...

[Bonzas]

...

[FZG]

Hello!

I recently got an old VHS player from Panasonic and just for fun I want to try to repair this device. It is an AG-1000B portable VHS player from 1990 and it has a problem with picture quality in playback mode.

Picture in playback mode is very noisy and often loses sync but the still images are nearly perfect.

I want to know, is this something that could be solved by recapping or is the video head likely gone?

Also, what mechanism is this?

Any feedback is appreciated!...

[alltvrepairs]

Hi,

Anyone has a circuit diagram for this Samsung Power supply pls?
QP801CS shorted. Blu Cap is not cracked.


[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"image.png","data-attachmentid":3265690}[/ATTACH]Hi,

Anyone has a circuit diagram for this Samsung Power supply pls?
QP801CS shorted. Blu Cap is not cracked.


[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"image...

[Yehuda170]

does any one here have SCH & BV for 820-02655? I see it's available on the web

[aminsab]

bios for laptop model: Aspire one 1-132

snid: 62504891276

probleme : error: turn on but not boot even to the logo


Thank You...

[trepachka]

Hello, this Asus laptop model FA707NU-DS74 has password which prevents computer from booting past it.

S/N: R3NRCX04A476126

I extracted current BIOS from a chip XMC 25RU256CXIQ (1.8V) sitting close to the CPU heatsink.

Please, help me remove the password. Thank you....

[zwerw3]

Hello. Please help. la-g07jp rev1.0 does not turn on. The 3 and 5 volt alarm goes up for 2 seconds and goes out. I opened the 3 and 5 volt power jumpers, removed the pu302, flashed the multimcontroller with different firmware, nothing helped. I noticed that on the u4104 the output is 1.5V, this voltage goes to the combined processor. Should there be such tension there?

[Markus1741]

https://[URL]https://www.badcaps.net... and cause the...

[NootABoot]

I created a supervisor password for my laptop a while back and I forgot it. It can't be reset by resetting CMOS. Can I extract it from a BIOS dump or through another method without a bios/eeprom programmer?

[sam_sam_sam]

This is another battery testing machine that needs to be modified for the cooling fans because these are noisy but not as bad as one of the other battery testing machines that I had modified recently because of it being too noisy

The battery testing machine is going to get two temperatures controlled cooling fans like one I put in the other battery testing machine I just have to remove the temperature sensor and relocate the temperature sensor to one of the heat sinks and put one on the other heat sink so the fan speed can be controlled by temperature

[URL]https://www.ebay.com/itm/186098049856?_trkparms=amclksrc%3DITM%26aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20211130125621%26meid%3D697803b7a1c44f989a96bd22433fa892%26pid%3D101465%26rk%3D1%26rkt%3D4%26sd%3D186098049856%26itm%3D186098049856%26pmt%3D0%26noa%3D1%26pg%3D3650466%26brand%3DUnbranded&_trksid=p3650466.c101465.m3507[/URL]...

[oleinikov_s]

[B]Zbook firefly 14 G9 Шасси (Main Board): 6050a3310001-mb-ax3 i need original bios with ME Cleared, i cant open any bios with FITC 16.1 please help.[/B]

[B]Zbook firefly 14 G9 Шасси (Main Board): 6050a3310001-mb-ax3 i need original bios with ME Cleared, i cant open any bios with FITC 16.1 please help.[/B]

[dimah77]

Please Need to unlock this BIOS
Motherboard x1403za rev 2.2
ASUS Model : X1502Z
S/N : R5N0CV10N87020D...

[trepachka]

Hello,

I have this HP 17-cn1008cy laptop with corrupted BIOS. On boot the message comes up and states that BIOS is corrupted.
Normally, I would download the bios file from HP website but for some reason their software does not run when clicked on it (winflash.exe file). So, I need your help.

S/N: 5CG1425NHD
ProdID: 552Y1UAR

BIOS file is attached. Thank you....

[goodpsusearch]

Recently I was given for free a Sony RCD-W3 with the following symptoms, CD recorder drive reads CDs without any issues (haven't tested recording function yet because I don't intend to burn CDs on that machine) but the reader drive shows disc error after some seconds of it trying to read CD. Tried both CD-Rs and commercial audio CDs with same results.

First thing to do was to clean the lens but that didn't change anything. Googling the issue revealed that this is a common issue on several Sony CD recorder machines and the culprit is SMD electrolytic caps located on the PCB bellow...

[lanlan]

laptop working but when i try to boot in usb, only black coming and stuck

[s_henya]

Hi guys,

Got this EVGA GTX750TI 2GB GPU
MB Bios is beeping when GPU is connected.
When booting with onboard GPU, MB is booting but the GTX isn't showing in windows device manager.
I would like to reprogram the bios EVGA 750Ti 2GB non-6pin 82.07.55.00.50
I searched around but couldn't fins 256kb BIOS like mine.

Anyone can please assist?...

[Mr.heinrich]

Greetings, i just decide to upgrade 8gb on board ram in my dell 5290 2 in 1, is it possible if i just swap the ram chip to 16gb or i should swap the other else like resistor or something. Please help me guys, thank you.

Just for information, my dell 5290 2 in 1 is using SAMSUNG K4E8E324EB-EGCF chip, this is 8gb chip ram.

SERVICE TAG: 160LHR2

Thank you so much.

I'm so sorry if my english isn't clearly.

[crazycavan]

polaroid TQLHD24PR004 no power
hi, my tv no longer starts like dead, no standby led

motherboard : MS36639-ZC01-01
panel : V236BJ1-P01
flash spi: GD25Q64
need usb firmware or to reprogram

[cook]

See the attached drawing of the chip I am trying to identify. I think the last character (the 'H') may actually be the manufacturer logo, but I am not sure.

This chip is part of a hand held device that detects metal. Its called a pinpointer, and is used in the metal detecting community. The chip is located on the main power rail which is from a 9 volt battery, noted in the drawing.

I tried many searches to find the part, but did not see anything that looked close. But then I have very little experience doing this and I could have easily missed something obviou...

[GraphicMan]

Hello guys
Because the unit is old (but only occasionally used) the loudness button causes some noise due to bad contact,
sprays did not work, so i decided to solder the pins that it connects on the pcb at the on (loudness on) position
i did that and it worked fine, i know from the bottom of my heart that the switch connects 2 pins and also d/c other 2 pins
on every position it have (6 pin switch), so i was curious what would happen if i clicked the switch off while the pins are soldered at on (so basiclly on and off at the same time), when i did so the sound is gone, nothing...

[CapLeaker]

Got something new. Recently I got trouble with receiving emails and syncing OneNote. Nothing else. I still can stream 24x7, VOIP, have full speed internet, but in the world cannot receive any emails nor sync OneNote. Take the computer somewhere else to a different internet location and no problems at all. Points to the router, right? NOPE! Hooked up my computer directly to the modem (which is in bridge mode) and have the same problems! Put all the network shit back together, start my VPN provider app, choose the closed VPN server to me and all the problems are gone! Is...

[fredyjbi]

Please help sir, this board does not turn on because VSYS_OUT is 9.2v, I compared it with a normal board VSYS_OUT is 10.2v, I have replaced the PQ101 and PQ102 mosfet and BQ 25700 which is known to be good, but the results are still the same, thank you

VSYS_OUT 9.2v Meter in resistance mode auto range 6M ok
NORMAL BOARD 10.2V

PQ101
PIN 2 20V
PIN 7 0.004V
PIN 6 6V
PIN 5678 0V

PQ102
PIN 567 0V
PIN 9 0.004V
PIN 234 9.2V (VSYS_OUT)

PU101 BQ25700ARSNR
1 VBUS 20V
2 ACN 20,21V
3 ACP 20,21V...

[Dancych]

Hi.

I have received for repair a DELL PRECISION 5480 on a LA-625P REV board. 1.0
I am attaching the working BIOS for this board. The BIOS does not contain the Windows key.

The region in which it is located is:
Windows Key Region : 0x011660B6 - 0x011660E7 Len 0x00000031


Other information:
- MAP Region Info :
- Image MAP Regions SPI 1 (64 Mb)
- DESCRIPTOR Region : 0x000000 - 0x00000FFF Len 0x00001000
- ME Region : 0x02121000 - 0x02B9CFFF Len 0x00A7C000
- BIOS Region : 0x00121000 - 0x02120FFF Len 0x02000000...

[cmilak34]

Hello,
I've got a SanDisk Ultra II 480 GB 2.5" SSD (SDSSDHII-480G)

Controller: Marvel 88SS9189-BLD2

Symptoms:
- the drive is completely dead, no response when connected to the computer,
- current consumption (0.01 A)
- under thermal imaging the only component that heats up is the controller,
- I checked the voltages according to the thread ([url]https://forum.hddguru.com/viewtopic.php?f=10&t=40329&view=previous[/url]) - all seem correct (typical 1, 1.8, 3 and 5 V).

Is there any chance of data recovery? I assume replacing...

[lofton]

Hello, I was updating the bios on my t470 20jn pf1q6dx5 using the soic8 clip that came with the Ch341A on the bios and pressed the clip too far back when i was taking it out and it knocked off what look like little capacitors, can this be repaired or bypassed with solder or a wire or what was originally on there, they are extremely small. I have attached two pictures, one with the capacitors on and one with them off. It took me weeks to figure out why the board wouldn't power on. I thought I had broke the bios. THe machine turns on for a second then turns off.

[ATTACH=JSON]{"data-align":"none","data-size":"custom","height":"632","title":"Broke...

[smaniak]

The laptop won't start. When plug power supply, on 19V in gives me 0,14A, without turning on the laptop.
I check it with thermal camera, and there is one resistor that is very hot, I change the resistor with new on but the result is the same.
In the attachment there is schematic of the resistor area, and schematic of the laptop.
I can't understand, why this resistor is getting so hot....

[Ishwar Khatri]

i have ecs h61 motherboard im having issues with usb port connecting disconnecting help how can i fix it...

[fixit007]

I picked up this TV that the prior owner said - just died.

Tested the fuse - burnt. A dead capacitor is visible too on the hot side (CP801). Got the replacement power board (cheaply - used). Replaced the board - the TV turned ON!

Now, about a month later (yesterday) I noticed the left side of the screen was flickering from time to time. That was already happening with the antenna input, not through HDMI.

Also, some glitchiness with a Fire stick on HDMI3 - I hit an app with quick dark screen in stick, the TV goes - no input. Then I had to choose the stick...

[dorrut]

hello, I apologize if I made a mistake by asking this question here, I have a dell xps 9310 in windows 10 does not see the wifi module, in bios wifi<none>, in Unbutu everything works normally, the network card is, killer AX500 dbs.am made bios update 3.6.0, and for the driver I tried all the available versions, now I have 1.0.0.1606, where is the problem and can it be solved??
2dfg6h

[Victor Torres]

Help. Can someone tell me what is happening? The rtx does not increase performance, it remains with a constant voltage of 0.631v. the performance is not as expected.

[ATTACH=JSON]{"data-align":"none","data-size":"full","data-tempid":"temp_336067_1714842396926_566","title":"image.png"}[/ATTACH]
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"image.png","data-attachmentid":3264988}[/ATTACH]Help. Can someone tell me...

[EazyBone]

Where do I get the software for Sony / Hisense tvs to install to emmc?

[trickartt]

Hello Badcaps!

I am trying to troubleshoot my Allen & Heath Xone:02 DJ mixer. I have had this for somewhere close to 20 years and have played music through it in one form or another pretty much every single day since I've had it, though these days it's usually from a wireless streaming receptacle (Apple Airport) more than the turntables that are also connected to it.

This week my music stopped working, and after a bit of a wild goose chase, I realised my mixer was dead. I checked the 500mA fuse in the device beside the power supply and found it was blown, so I replaced...

[angelos]

Hello Guys,

I am not familiar at all with plasma tv's but i tried my luck anyway since business is so bad. We gotta try, right?
Anyway, the original problem was a tv clicking and not starting due to a short circuit on the Z-Sustain board (on the right side from the rear).
I found two transistors shorted (30F123) and changed the gate driver ic's as well. I think they were FAN73711. I soldered for dry joint on power supply, Y-Sustain and Z-sustain. Started up the TV and the short was gone so i had an image but.....
Lots of colorful speckles on the image and also there...

[TIXOU14]

HI NE[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"DSD.png","data-attachmentid":3264908}[/ATTACH]...

[Noursa]

Hello

I'am a beginner in electronics repair and i got some trouble to find what's goning on a computer. It is a lenovo yoga C940-15IRH laptop and the screen doesn't work anymore, but that work on an external one

the screen seams to be hard to unbuild properly so i want to test it by other way

how can i be sure if the signal is really send to the screen ? i did some check on screen connector on LCD1 got 19v and on MiC1 connector on the other side of the screen (dunno if it's for the screen itself or other thing) got a lot of 3.2v pin

did u got...

[MeetingIncapable]

Hello,

I am new to repairing computer electronics, so excuse any mistakes I make.

A friend of mine had a broken graphics card (MSI Radeon RX 5700 XT MECH OC) and gave it to me. It does not power on or show any signs of life.
I identified what looks like the remains of a blown capacitor at the bottom of the board (see picture).

I wanted to replace the capacitor, but I have two questions:[LIST][*]Does this repair have a chance of working? or is a blown capacitor a sign something else is wrong?[*]How do I determine the rating/value of this capacitor?...

[labello]

Hi guys my friend gives to me this thing, it works but the selector on of music is broken , I tried to do some research on Internet to change it but I didn't find anything. I hope that someone can help me to find it thanks all for the reply