Hi,
My M3401QA does not power on properly: no display (all black) and with white LED charging port blinking slowly (once every ~3 seconds).
Checked several points across the board and supplies are up and running but I need to double check when I get schematic.
Result is still the same even with DC jack inserted and battery connector removed.
Tried flashing the latest BIOS as of this date to no avail which I suspect has something to do with DMI but tools could not run properly on my machine and couldn't find manual copy of DMI through hex editor and not sure...
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-
05-20-2024, 11:28 AM
-
Hello again,
I am [I]once again[/I] working on this same laptop that I was working on in [URL="https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/bios-requests-only/3262622-hp-14-dq0055dx-bios-problem-pending-image-being-cleared-loop"]this thread[/URL]. I was able to fix all of the problems that it had, but now it has one final problem. The computer will turn on and work completely fine until you shut it down. Once the computer has been shut down, it will not turn on again, nor will it...05-22-2024, 02:32 PM -
Hello my vacuum cleaner dock died, 0V on output. I replace the caps but still no voltage. I found out that this resistor is broken (showing 0 Ohm) do know the value of this? Is this really 0 Ohm resistor?...Today, 10:07 AM
-
motherboard code KV481/KV581/ NM-F051 Rev 1.0
cpu R5 7000 SERİES
S/N.PF4K7WNG
[B]There is no backup[/B]motherboard code KV481/KV581/ NM-F051 Rev 1.0
cpu R5 7000 SERİES
S/N.PF4K7WNG
[B]There is no backup[/B]motherboard code KV481/KV581/ NM-F051 Rev 1.0
cpu R5 7000 SERİES
S/N.PF4K7WNG
[B]There is no backup[/B]Yesterday, 09:43 AM -
Hello all,
I'm working on an Acer Nitro 5 (AN515-54) with motherboard EH5VF LA-501P with a short on the power rail.
I'm just learning board level diagnostic, but here is what I've found so far.
I injected 1.5v to one of the positive leads on the DC jack connector (PJP101) and read about 1.4a to ground.
I felt around for heat and found the MOSFET at PQB12 is rippin hot!
when i pulled the MOSFET from the board the short went away. In my mind it was a faulty MOSFET.
Ordered a replacement and got it installed only to find it gets very hot again and the short returns....Yesterday, 06:07 PM -
Hi everyone i'm new on this forum, i have a problem with Samsung UE55MU6120KXZT, motherboard model: BN41-02568, After disconnection from 220V the TV remains switched off with status led off. I need information on how to proceed with reprogramming the flash memory and the BIN file to reprogram it. I am not very experienced but I would like to learn so the more detailed the information, the better it will be for me to proceed with this repair.
If there is already a thread of this type can you send it to me or link it. I include photos of the motherboard where you can see the IC, thanks in...Today, 09:39 AM -
Hi
I need the value of C102 .
[B]Briefly[/B] : Blown Fuse . In-Series lamp lights fully = short on Hot Side - Bridge DC [U]Holes[/U] are shorted !. Bridge OK out-of-circuit. Chopper Mosfet and Diode - OK. D102 ( T4 Diode ) measures In-Circuit 0.041V both ways but Normal outside. Other caps / diodes..ok. Short remains Haarg .
BUT ! , when C102 Cap ( between Main Cap legs , it doesn't show as I took it out for easier access ) was taken out - short is gone .
Thanks a bunchHi
I need the value of C102 .
[B]Briefly[/B]Today, 09:18 AM -
Hi everyone!
Hope you're all having a great day, and thank you very much for stopping by and taking the time to read this post to help me with my parents' Samsung TV.
My issue: No backlight.
Model: QE82Q70RAT
Type No: QE82Q70RAT
The TV was already serviced by Samsung once under warranty for the exact same issue, but six months after the fix, the backlight went out again. Now, Samsung is asking for nearly the same price as a brand new TV to fix this with the same 6-month guarantee.
So hopefully, I can fix this cheaper.
...05-22-2024, 06:56 AM -
Hello to everyone.
My [B]W26361-W84-X-02[/B] motherboard starts but don't show image (no logo screen neither bios). Because, I have two of them I desoldered the bios chip from the no working motherboard and I soldered it to the working motherboard and the motherboard works OK, so the bios firmware isn't the problem. Below I took some measurements from the no working motherboard when is power on. Also, I replaced the RAM and didn't work again (maybe some pins from the RAM slot don't have the right voltage?). I replaced and the bios battery, and I made reset on the bios and again the problem...Yesterday, 03:51 PM -
Hi,
anyone able to provide the service manual for old plasma Panasonic TX-P42ST50E?
It turns off almost immediately (0~5 seconds after pressing the on/off button) and starts flashing the red diode 6 times.
I disconnected the left-hand side board (SC?, both the ribbon cable and the power cable to it) and also another ribbon going to bottom left board. Then the led signal is 8 flashes. According to service guide to another Panasonic plasma it would mean the left-hand side board is faulty. But I'm not sure it 100% applies to my model.
I checked that board for any obvious faults...05-22-2024, 06:59 AM
-
Hi can anybody help me with a Bios password removal on a ASUS UX425EA-KI560T /N:M6N0LP02P89724B NB2555_PCB_MB_V4
I have searched under Bios guides and Methods, extracted the bios and used a Hex reader to search for the correct string but i simply cant get my head around it.
Original Bios dump attached...Today, 01:54 AM -
Hello my vacuum cleaner dock died, 0V on output. I replace the caps but still no voltage. I found out that this resistor is broken (showing 0 Ohm) do know the value of this? Is this really 0 Ohm resistor?...Today, 10:07 AM
-
Hi everyone i'm new on this forum, i have a problem with Samsung UE55MU6120KXZT, motherboard model: BN41-02568, After disconnection from 220V the TV remains switched off with status led off. I need information on how to proceed with reprogramming the flash memory and the BIN file to reprogram it. I am not very experienced but I would like to learn so the more detailed the information, the better it will be for me to proceed with this repair.
If there is already a thread of this type can you send it to me or link it. I include photos of the motherboard where you can see the IC, thanks in...Today, 09:39 AM -
Hi
I need the value of C102 .
[B]Briefly[/B] : Blown Fuse . In-Series lamp lights fully = short on Hot Side - Bridge DC [U]Holes[/U] are shorted !. Bridge OK out-of-circuit. Chopper Mosfet and Diode - OK. D102 ( T4 Diode ) measures In-Circuit 0.041V both ways but Normal outside. Other caps / diodes..ok. Short remains Haarg .
BUT ! , when C102 Cap ( between Main Cap legs , it doesn't show as I took it out for easier access ) was taken out - short is gone .
Thanks a bunchHi
I need the value of C102 .
[B]Briefly[/B]Today, 09:18 AM -
Hello all,
I'm working on an Acer Nitro 5 (AN515-54) with motherboard EH5VF LA-501P with a short on the power rail.
I'm just learning board level diagnostic, but here is what I've found so far.
I injected 1.5v to one of the positive leads on the DC jack connector (PJP101) and read about 1.4a to ground.
I felt around for heat and found the MOSFET at PQB12 is rippin hot!
when i pulled the MOSFET from the board the short went away. In my mind it was a faulty MOSFET.
Ordered a replacement and got it installed only to find it gets very hot again and the short returns....Yesterday, 06:07 PM -
Hi,
I'm troubleshooting SN board of Panasonic plasma TV and I'm curious about a component that looks like an optocoupler, it has 5 legs though. I tried to check between legs 1-2, but no diode junction there, it's open. So either that is not a diode there or it's burnt.
For future searches, the part num is B3PBE0000060, the label on the component says 9157 and N219.
Any idea?
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"image.png","data-attachmentid":3277057}[/ATTACH]Hi,
I'm troubleshooting...Today, 12:51 AM -
Hi, I need resistor value at R51 mark at Epson L3210 Power Supply. The model of PSU is Model EPS-167E. R51 is burn, so I didn't get the value. Thanks.Yesterday, 10:22 PM
-
motherboard code KV481/KV581/ NM-F051 Rev 1.0
cpu R5 7000 SERİES
S/N.PF4K7WNG
[B]There is no backup[/B]motherboard code KV481/KV581/ NM-F051 Rev 1.0
cpu R5 7000 SERİES
S/N.PF4K7WNG
[B]There is no backup[/B]motherboard code KV481/KV581/ NM-F051 Rev 1.0
cpu R5 7000 SERİES
S/N.PF4K7WNG
[B]There is no backup[/B]Yesterday, 09:43 AM -
Hello everyone.
Here is the bypass solution for several Lenovo ECs.
This has worked on many ECs.
Only works if password is contained in EC
I succeeded on many models
[URL="https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/bios-requests-only/104872-lenovo-l15-gen-2-ryzen-password-removal-w-vertyanov-successor?p=3217086#post3217086"]https://www.badcaps.net/forum/troubl...86#post3217086[/URL]
[URL="https://www.youtube.com/channel/UCeF58jC2Bt_adKcguvynjeA"]https://www.youtube.com/channel/UCeF...t_adKcguvynjeA[/URL]...03-17-2024, 11:57 AM -
Hi guys!, i searching all bios.
Main(16MB) , 2MB y 1MB (EC)
For this machine, a not find over internet.
Thanks in advanced.
Brand: Lenovo
Model: Thinkcentre X1 Type 10KE
Serial: S4BC4340
Product Id: 10KECTO1WW
Motherboard: LM1 MB
15000-1
348.04A13.0011...Yesterday, 08:22 AM