Lenovo Thinkpad P72 EP720 NM-B723 MB - Power disabled within 2 seconds after plugging the charger

[Mita99]

Hi,

Try to repair a Thinkpad P72 EP720 NM-B723 MB with I7-8850H processor and N18E-Q1-KB-A1 (P3200) GPU with 6GB memory. Unfortunately there is noinfo what happened to the laptop. I got it disassembled with parts missing, like keyboard, battery.

Unfortunately I have no schematic available for me (requested in the sub porum) but got the boardview file.

Symptom: after connecting to the charger the power led light up for one-two second and switch off. After a couple secons the power led light up for half a second and switch off. No battery, no IO board, no...

[kurtsta11]

I have a JVHFC1 HE430/HE540 Rev 1.0 that has a McAfee BIOS lock and driver encryption. I took a dump of the BIOS and saved it onto my computer. I tried erasing the BIOS and flashing a known good BIOS, but the laptop does not display and image and the fan turns on then off only moments after pressing the power button. The power indicator light also just remains on with no image on screen. Not sure what else I can do from here to be able to have a working accessible BIOS. I have attached a dump of the BIOS that was on the system.

S/N: PF-3HZVGN...

[m1ch43lzm]

Hello
I have this laptop HP 14-dk1003dx which has the following problem:
Power LED and fan cycle abuut 4-5 seconds on, 2 sec off, current draw is around 20mA from bench PSU

Board model: 6050A3176101-MB-A01, no schematics found, closest boardview is this 6050A2983601 : [URL]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/schematic-requests-only/3292286-hagrid-6050a2983601-mb-x01-boardview[/URL]

Original fault was shorted main 19v line by mosfet Q66610, no LED at charge...

[JOOYOUNG]

Hi everyone,

I'm trying to modify the onboard RAM SPD data inside a BIOS file.
I just want to update or replace the SPD information properly so that the system can recognize the correct memory specifications.

I already know that BIOS is hard-coded and that not everything can be simply copy-pasted.
But my goal is only to update the SPD data itself — nothing related to hidden menus or enabling extra BIOS features.

For reference, my laptop model is [B]RZ09-0472[/B], and I found the SPD information I need from an [B]ASUS BIOS[/B].
I have uploaded...

[Rasmus Strandby Kusk]

Hey people.

So my boy broke his old laptop and I got him a new store return for a great price.

Problem is that it has had the motherboard replaced and the technician didn't fix the model type in bios (not serial either so no windows license) just say's alderlake. Now the software to control the laptop checks the model type in bios to install so that's a problem.

I did some research and tried to edit the information but with no luck. Would the correct approach be to dump the complete bios and hex edit the info then reflash? Is there an easier approach?...

[lfhlaw]

I got this Sony KD 43X85K TV. It will not power on, No LED light in front.

1) I did check for blown Capacitors and I didn't see any bulging Capacitors, but that doesn't always mean there isn't a bad one present.
2) I was going to check voltages at the pins and I did get some voltage, but got confused as there are 14 pins, but the descriptor on the left of the pin connections has only 9.
Voltages i did get were a 3v which is usually stand-by power IIRC, and 2 pins had 13v and I was reading similar voltages to the main board. But unless I'm able to figure which pin is which,...

[kurtsta11]

I have a JVHFC1 HE430/HE540 Rev 1.0 that has a McAfee BIOS lock and driver encryption. I took a dump of the BIOS and saved it onto my computer. I tried erasing the BIOS and flashing a known good BIOS, but the laptop does not display and image and the fan turns on then off only moments after pressing the power button. The power indicator light also just remains on with no image on screen. Not sure what else I can do from here to be able to have a working accessible BIOS. I have attached a dump of the BIOS that was on the system....

[adamski1952]

Hi all working on an [COLOR=#000000][FONT=TT Norms Pro][SIZE=15px]Acer Aspire A515-57[/SIZE][/FONT][/COLOR].The 3v LDO CHIP Sy8388brhc chip has shorted out. pu301 on the schematic here: [URL]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/schematic-requests-only/104372-acer-aspire-a515-57-schematic-or-boardview[/URL]
My question is can I replace (Sy8388brhc global part #SY21243B) which has High Efficiency Fast Response, 8A, 28V Input, with the sy8386brhc (global part# SY21138BRHC) wihch only supports...

[wnt2fx]

I installed a new keyboard and it can smc reset and the power button works. but nothing apart. no boot picker e.g. I am wondering how this can be explained if the alt key (smc reset) is working. I am aware that on the board side shift, ctrl, alt and pwr are separately wired but the board, trackpad/cable are good. The keyboard was tested working prior installing and as another keyboard now tested on the same board improvised works as well the only idea I have is that I damaged the keyboard flex cable while installing it into the case. But why hell smc reset and power are working then ? Anyone has...

[Armoire4746]

Medion Akoya E2228T schematic required.

[JasiqiLabeat]

Asrock fatality x299 gaming k6 i need schematics, i see 2 pages that have that but i cannot buy to get that.
If somebody is a member on any page for schematics please send me one...

[loveyolanda]

Hello.

I have an mini pc from ecs.the modle is liva Z3 plus
I put it long time ago，now it's not working.

So i want to reflash it with ch431 bios flasher. unfortunately, from ecs site, it just contain rom files.
Tried to convert it with UEFI tools, but no luck.

Any one can help me with the ECS Liva Z3 plus bios dump?

Thanks very much.

[jackx]

[B]HP ZBook Fury 15.6 inch G8 LA-K771P REV:1.0[/B]

plss i want schema and boardeview[B]HP ZBook Fury 15.6 inch G8 LA-K771P REV:1.0[/B]

plss i want schema and boardeview

[dtech.dz]

Hello,

someone can help me to fix bios no display.
i attached bios dump.
thank you....

[ktmmotocross]

Hello.
Have this ps5 pro EDM033 that came with damaged hdmi connector. i replace it and console works for few days but show hdmi problems when cold start. so cold joint. reflowed connector and decoder ic as i think he have cold joint. but now i have only one beep and no start. can heatdamage of this decoder ic prevent start?

i have ps5 repair guide but not ps5 pro so link me to it if u know it

[titomno2]

Hi guys,

Hope you are fine.
I'm struggling to fix a small issue with one of the tablet Surface Pro 7 type 1866 i'm fixing (windows 11).
The boot time is so long (up to 5-10 minutes).
After several attempt I finally find one thing is not right (PD controller firmware is 0.0.0 it can't update to 3.6.1) under device manager I have a yellow mark, code 14 and error as decribed on picture attached.
I don't find any information regarding the error code 0x1803 (and sometimes it change to 0x1804.
In the past I have found that if the update is a success, the boot...

[ktmmotocross]

Hello.
Have this old hp compaq nc6320 that came with one long and one short beep + backlight on. bios battery have only 0.5V. I remove it, but now it start beep some weird way. I think it is bios /one long + two short beeps+ baklight on/, but when i flash new bios from hp, no beeps and no backlight.

i attach record of beeps...

[chanuka99]

asus 412 fjc needed...

[MarcB7]

I need of Asrock B450m Steel Legends schematic motherboard, i thank you who can make it available to me!

[hugocarmo]

Hi.

I´ve been given an old CRT from Panasonic, it´s almost new, it was storaged and almost not used since bought.
It is imaculate inside, almost no dust or debris inside.
The picture is good, but I have no left sound channel, I tried all the inputs, outputs, even on headphone jack. In AV2 I hear sound from right channel but no image, on tv tuner only right sound channel, the same for AV1.
So I started to look for a service manual, I found one, and started from the beginning.
Most of the times the caps are the problem so I orderer all the caps for all boards,...

[jasiukxc]

Hello.
Can you help me extract EC from BIOS dump?

Asus FA507NV-LP025
DA0NJSMBAF0 rev:F
SN: S1NRCX04E24803A

I have to replace the corrupted KBC (IT5570VG-256) but i can't find this file anywhere....

[Emile Elfferich]

[B]Hello everyone,
Used same charging cable. First A stopped recognizing my iPhone, then it stopped charging.
Please advise.[/B]

[ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3624091}[/ATTACH]
[B]Hello everyone,
Used same charging cable. First A stopped recognizing my iPhone, then it stopped charging.
Please advise.[/B]

[ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3624091}[/ATTACH]...

[Sofian75]

This is a gpu I purchased to see if I can repair it (was supposed to be dead), it was working perfectly fine in windows, I even launched the huneven stress test and didn't notice any problem.
Then since I am learning I ran MATS to see if it would find any error.
Could you help me understand the report please?...

[Olaa]

Hello
I need bios dump Lenovo Slim 7 NM-E412.
Bios in two chips - 8mb and 16 mb
thanks!...

[praveenramavath]

[FONT=Arial]Hello All,

I have an issue with my Majority PETERHOUSE GRADUATE Internet Radio, it keeps rebooting at the boot logo Welcome screen. I have an another forum active in other website but due to lack of response I am posting the same here. I am positing a link below that has pictures including all the troubleshooting I have tried, appreciate if someone can take a look and give me any suggestions.

[URL]https://www.hifivision.com/threads/majority-peterhouse-graduate-stuck-at-boot-welcome-screen.98243/[/URL]


[B]Troubleshooting Summary: Majority...

[Mita99]

Hi,
If you have schematics, boardview for the EP720 NM-723 Thinkpad MB with N18E-Q1 GPU than please help me to be able to repair one. Thank you in advance!

[YellowJacket]

Hi folks,
DELL Latitude 5410, board number FDZ41 LA-J371P Rev: 1.0 (A00), schematic uploaded in different post, here is the link --> [url]https://www.badcaps.net/filedata/fetch?id=3484415[/url]

When I connect it to a power ( DELL round charger, or USB-C ), LED on the power button starts flashing white, and the laptop doesn't do anything ( flashing slows for a very brief time in time when I press it, but it continues again ). Battery is not charging. While the charger is connected, I have few voltages present, but some of them are fluctuating, see attached pictures.
...

[arctor]

hi guy my friend gives me this tv a 50tu8070u that has no picture at all, sound ok, backlights ok. i tought it was a bad panel, but the tv has many horizzontal lines green, i tried with the tape method but nothing change, only the green lines disappear but still no picture. You that have more good than me, do you think it s a panel or can be the main board, because my friend wants buy a new main board....but the tv respond to the remote control, have sound only no picture so i think it s a panel problem that is so broken that i cant fix with tape...or i wrong if someone can help me thanks, i give...

[lagouzas]

Hello, user tried to update BIOS in order to upgrade CPU from Ryzen 3000 to Ryzen 5000, Bios update worked but he had some graphics issues so he tried to revert back, then he probably either corrupted the BIOS or the Mobo has developped some malfunction. Here is the BIOS I ve read from the working bios chip, if anyone can give it a try I would be glad....

[Danny Butler]

Quick Backstory, the Surface Pro was in the back of my car, and got some liquid inside it (didnt know at the time and charged it, and tried to power it on)
The area it affected was the botttom side of the board near and including the usb ports...see photo)
it was only damp in that area for around 3/4 days, i cleaned the area with isopropyl alcohol and a gentle brushing.

obviously it didn't boot up (as I'm here) i've downloaded the board diagrams, (and used referenced from another post, [URL="https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/3579223-surface-pro-7-1866-won-t-turn-on"]Surface...

[beal]

hi

Please Bios MainBoard Foxconn CLO430 Rev A01

thanks

[SIZE=24px]post moved..[/SIZE]hi

Please Bios MainBoard Foxconn CLO430 Rev A01

thanks

[SIZE=24px]post moved..[/SIZE]

[snar]

Hi everyone, can someone please fix my bios the problem is no display
ill attached the orig bios. thanks in advanced.

Laptop model: Acer AL15-5M-55R1
Model no:N23L1
snid: 345003232033
board model: 6-71-NL4M0-D03...

[Grandoni Manuel]

Hello experts ! Have big problem and not understand with iPad Pro 11 3th gen.
So with power supply work perfectly but if I connect usbc not power on !
first under thermal can find a short near CD3217 on the 3v3 ACE line ! Take off it then stuck at 5v and 0 amps !

then I try to change CD3217 with other one from MacBook but the iPad now shout down also the tool for see voltage and amps 😅

ok then I want try to take one directly to donor working board and also the eprom for safety but stuck again 5v 0amps !!!!
incredible 😳
mom then I tried to...

[modestoros]

Hi
I'm trying to repair the laptop, which has water damage, but I found a resistor that was too corroded to be identified. I looked up the Boardview software and the part is PR5301,
[ATTACH=JSON]{"alt":"Click image for larger version Name:\tMissing Resistor 1.png Views:\t135 Size:\t23.6 KB ID:\t3623443","data-align":"left","data-attachmentid":"3623443","data-size":"full","title":"Missing Resistor 1.png"}[/ATTACH]









...

[AustinCER]

Hello,

I currently have an [B]HP ENVY Desktop TE01-1214
S/N - [/B]2MO22342GX
[B]Motherboard[/B] - L75365-001
[B]BIOS Chip[/B] - W25Q128JVSQ

Suspected Windows updates contained BIOS update in which, during update the Desktop PC displayed a black screen to the monitor while still powered on. Display image never restored.
Tested RAM in both slots, as well as new RAM. Tested a brand new known working i5-10th Gen GPU (Same CPU as original installed). Cleared CMOS. Tested the Desktop PC with a dedicated GPU connected, but still no display. Device will...

[Hendrie]

Hi there, I'm hoping for some help. I did a bios update a while back, and have had problems since - laptop taking 30-60 seconds to post during boot, unable to correctly go in and out of sleep mode, causing battery issues. I tried to redo the BIOS update but it fails each time. I googled around, and there's lots of similar symptoms on the same model as mine, where people say the ME Region is corrupted. When I boot to my BIOS, alongside ME is blank. I've tried to follow a few guides but am struggling and hoping someone can help me.

I have a CH341A
I downloaded and ran Universal...

[spleenharvester]

Hope someone can help me, this is the second time I have killed one of these and I wasn't able to fix the last one. This is a portable Farad capacitor-based welder: [URL]https://www.aliexpress.com/item/1005004682391629.html[/URL] it has worked very well for me, but the DC jack failed. I replaced the DC jack, but did not wait for the capacitors to discharge, and in the process accidentally shorted the green COM wire (that joins the middle of the capacitors) to the -12V terminal. After that there was a burning smell. Now the machine turns on and runs but the capacitors do not charge up.
...

[zahi]

Hello everyone, I need DSP dump BIN files for ONKYO TX-NR5009, TX-NR3009, Integra DTR-80.3, PR-SC5509, DHC-80.3, DTR-70.3, I think also 5007 is the same, or other...
I have replaced the DSP chip, still not working.
Can you share please?

[Chengho]

Working bios

LENOVO LOQ 15IAX9 JLG10 LA-N221P REV 1A...

[lrservicios]

Hi all my friends ! i have an HP OMEN DESKTOP gaming with no video symptom, i already tested graphic card and RAM they seem to be OK, i suspect BIOS faliure please can you check for me

Exact model is: 875-0911ns S/N: 8CG8435D4N...

[ub6ib969]

Hi,

Have a Microsoft surface laptop studio1964 that in unable to pass the surface logo. User suggested updates where applied.

Motherboard: M1138155-008
S/N: 0F00R2Z215200C
Model: Surface Laptop Studio

Thanks in advance....

[dbuergi]

Hi all,

I got a 16inch MacBook Pro showing 5v and 0,3a on the left ports and right side has one power cycling and one showing nothing. The one cycling shows 30c under thermal camera. Surrounding components show no corrosion or any shorts.
Any ideas what to check next? The whole board looks clean compared to the other A2141s i saw....

[x2006nzl]

Hello everyone,
I have a RTRU6528-C-CA the leds went i took it apart and ordered the same nu.bers they fit and the holes are right but the connectors a bit different can I cut the connector and solder the positive to the positive and negative to the negative on the led strip for it to work thanks...

[mattx97]

Hi,

I've had a little issue with this laptop. It had a charging issue, so I replaced the charge port and tried the old charger. It was clearly damaged, and the laptop started smoking. So I ordered a new charger and tested again, but no power, and upon further inspection I noticed a power management IC was blown.

I just wanted to know if it was in any way fixable, considering it seems it may have burned layers of the board.

I will attach two photos of the blown one and the seemingly good IC.

Board rev DAG3PAMB8D0

Any help would be...

[kotel studios]

Hi,

Just as the title says I need the BIOS file in .BIN format for an MSI 845PE Neo (MS 6580 V3.0. All I can find is the updater soft for DOS and one DTK OEM BIOS which doesn't work (or my board is just dead).
The files from the DOS updaters are missing the BIOS strings, so idk if they'll work.

[otgava]

Hi guys
ZIP file has 2 images from 2 chips, I have put identifiers for you to locate them. All grabbed with a programmer. Enjoy it if you need...

[SoporteNetFe]

Hi, please help repair my bios, the machine boot with black screen:

Model: UX3402V Notebook PC
SN: S3N0LP006954108
Board: NB5936B_MB_V4 UX3402VA_MB
BarCode: ,S105NBLP000MCRMB,UX3402VA,60NB10G0-MB8100,300,

Backup BIOS attached! Thanks for help......

[Jaduselhombre]

Can someone help? Error after power outage during BIOS update
HP EliteDesk 800 G5 SFF
SN: CZC043D00B
MB: L65200-001...

[obelix24]

I got two Macbook's Pro 15" A1707 both fully working except no image on internal LCD.

I've checked and it looks like it's problem with U9850 (on both pin 1 on screen connector is 0.007 or 0.050 in diode mode)

My question is if this IC can be ordered from Aliexpress (will it work) ?? or it needs to be taken directly from donor (a1707, a1990, a2141) ?

Is this IC interchangeable (on my board i have 6142E and i found that there can be also HD3SS212) are this chips same ? ? Is it possible to find this IC on some other Macbook 13" (air, pro) ?? i have...

[bjhnsonjr2734]

I am really needing Schematics for the motherboard on my Gateway laptop model GWTN-156-7BL

I attached a pic of motherboard info



[URL=filedata/fetch?id=3623030&d=1745585986][ATTACH=JSON]{"alt":"Click image for larger version Name:\t17455859416328136595107599649182.jpg Views:\t0 Size:\t4.66 MB ID:\t3623030","data-align":"none","data-attachmentid":"3623030","data-size":"small"}[/ATTACH][/URL]...

[jaiyenyen]

help i need [B]Boardview & Scematic Please ?[/B] imac 24" M3 M4help i need [B]Boardview & Scematic Please ?[/B] imac 24" M3 M4help i need [B]Boardview & Scematic Please ?[/B] imac 24" M3 M4

[CornholioGSM]

Hello,

I am now inside this Spectre X360 laptop.
First problem was melted usbc connector.
So i have changed connector, measured connection and tested charger - Input still on 5V - 0.0020A.
Then i have ordered and replaced TPS65994AD - now it looks for me better - still 5V - on start approx 0.3500A and after few seconds it goes down to 0.0100A.
Tested on Fnrsi tester.
I know that TPS is needed to be "programmed" to correct working by bios update.
Now i want to inject 20V , power laptop on, and make bios update.
Problem is, that for...

[uwimo]

The computer freezes when starting up and cannot enter BIOS
Motheboard: 6050A3515201-MB-A02

[skymoon83]

hello. after updating the bios on the lenovo idepad flex5 14abr8 laptop, it is stuck on a black screen. It shines, but there is no image.

Motherboard code:

Lc58-abr mb
223069-2
448.0re25.0021
S/N:PW08TQNP

the original bios is attached. I would be glad if you could help....