Hi,
I'm learning about motherboard repair and I believe I've traced the issue down for the South Bridge on the particular motherboard I'm working on. My path of concluding that:
- There's no sign of any attempt to power on when pushing the power button.
- No PSON signal is reaching the 24-pin ATX connector.
- The Super IO chip is receiving the PS_SWITCH signal from the power button and is relaying this signal back to the South Bridge.
- The Super IO is not receiving the S_SLPS#_R signal back from the South Bridge
- If I pull the Super IO S_SLPS#_R pin...
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by norbiszokeHello,
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!...Today, 06:54 AM -
by ProttHello, my apologies for reviving this thread. I have a 8gen NUC with a (possibly?) dead bios - the fan starts up, slows down, but it doesn't show any picture (recovery button doesn't work either). The dump is attached.
Could anybody please help me with fixing it? I am not able to find any BIOS dumps for this model anywhere.
[B]S/N:[/B] BTDN9320085T
[B]Model: [/B]BLKNUC7i7DNKE
Thank you so much! Hello, my apologies for reviving this thread. I have a 8gen NUC with a (possibly?) dead bios - the fan starts up, slows down, but it doesn't show any picture (recovery...-
Channel: BIOS & Schematic Requests!
Yesterday, 07:02 AM -
-
by vinzmthi 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...1 PhotoToday, 07:05 AM -
by StormCrowHi 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...-
Channel: BIOS Requests ONLY!
Today, 07:48 AM -
-
by hasefrochHello 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.4 PhotosToday, 06:29 AM -
by chth96Hello.
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...-
Channel: General Capacitor Questions & Issues
Today, 07:11 AM -
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by monitronI am working on a HP Pavilion 27-d0010nd that has dark screen. It appears that the backlight is not working.
Now i discovered that the backlight circuit is on the scalar board and has a burnt mosfet. (caused by a ceramic capacitor short).
If anybody can help me identify the partnumber it would be a very great help.
The board number is:
L76838-001
L99794-001
BigBen Scalar board.
[URL=filedata/fetch?id=3253797&d=1713275701][ATTACH=JSON]{"alt":"Click image for larger version Name:\tuhd-scalar-board-aio-hp-27.jpg...Yesterday, 07:53 AM -
by fredyjbiplease help friends x1 yoga 7th no display beep melody thank you...
-
Channel: BIOS Requests ONLY!
Today, 03:14 AM -
-
by Carl0s-Hi,
Sooo - our IT got a pile of old iPads that the sales guys have been mistreating. These are free for grabs if you want to try to get one working. Thought I'd give it a try - if I get at least some life to I can give to my kid to entertain during a car rides.
But the iPad it self - its a 5th gen cellular model. When I initially plug it in it was completely dead. It was not recognized by my Mac nor it started to charge. Disassembled it opened up the battery connector and checked the battery voltage. My multimeter showed 0,7v. Had a spare micro-usb charging board lying...04-15-2024, 12:51 PM
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by norbiszokeHello,
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!...Today, 06:54 AM -
by fredyjbiplease help friends x1 yoga 7th no display beep melody thank you...
-
Channel: BIOS Requests ONLY!
Today, 03:14 AM -
-
by chth96Hello.
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...-
Channel: General Capacitor Questions & Issues
Today, 07:11 AM -
-
by vinzmthi 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...1 PhotoToday, 07:05 AM -
by hasefrochHello 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.4 PhotosToday, 06:29 AM -
by trepachkaSee attached image. It says "X322" on it. This is a follow-up to my previous posted topic. The issue is upon lid closing, the screen turns off. When lid is opened, the screen remains dark.
This component is positioned right on the edge of the motherboard and has like a cradle made inside the case. I am assuming this component is used as a lid close sensor.
Please, help me identify it. Thank you....Yesterday, 03:26 PM -
by StormCrowHi 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...-
Channel: BIOS Requests ONLY!
Today, 07:48 AM -
-
by jimmy2022schematic required for lenovo 13acn5
yoga 7 series...-
Channel: Schematic Requests ONLY!
Today, 03:46 AM -
-
by Carl0s-Hi,
Sooo - our IT got a pile of old iPads that the sales guys have been mistreating. These are free for grabs if you want to try to get one working. Thought I'd give it a try - if I get at least some life to I can give to my kid to entertain during a car rides.
But the iPad it self - its a 5th gen cellular model. When I initially plug it in it was completely dead. It was not recognized by my Mac nor it started to charge. Disassembled it opened up the battery connector and checked the battery voltage. My multimeter showed 0,7v. Had a spare micro-usb charging board lying...04-15-2024, 12:51 PM -
by s_henyaHi 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?...Today, 12:25 AM