I think I might buy the bare pcb and put it together as a project. Hopefully it will not have a short circuit in the pcb 
Prott
Senior Member
Last Activity: 01-25-2026, 04:01 PM
Joined: 05-09-2022
Location: Warsaw
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Thank you CapLeaker! The leakseeker looks like an amazing piece of equipment to have. I think I might buy the bare pcb and put it together as a project. Hopefully it will not have a short circuit in the pcb
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PCB Layer to layer short on a low voltage power plane - how to find it?
Hello!
Recently I have a problem finding a dead short (as far as my cheap multimeter is concerned) on a multilayered (12 layer) PCB. It is caused due to mechanical stress (warping the board and, I assume, cracking inner layers). Injecting voltage of 0.9 V (operational voltage of that part of the circuit) and drawing 0.5 W doesn't cause any visible hotspot on a thermal camera.
Does anybody have any tips & tricks in order to locate the short more or less precisely? The area has a lot of powerplanes, so it's both blessing and a curse.
Silly idea no. 1: Can I... -
PS5 - long screw damage, via to ground layer short?
Hello dear Badcappers,
I came across a PS5 that was longscrewed. The screw went through the HDMI IC (which I replaced + repaired the traces it damaged), however the screw also bend the board and slightly cracked it on the other side. It still seems like it could be fixable though as the area might not have lots of traces going through it (fingers crossed).
Can somebody, please, measure their board and tell me if my assumption of an inner short between the via and ground layer is correct? These 3 pads have almost no resistance. I would like to make sure those are not some data... -
Can somebody please point me to any direction as to how fix the non working drive internal drive? I am pretty sure it's a BIOS issue, as I soldered the drive correcty (checked all the connections with multimeter afterwards and made sure there's a connection), yet the machine doesn't see any drive at all. I will be ethernaly grateful for any tips, cause this is the only thing that's keeping this machine from fully working. :/
Is there a setting that I can change in FIT to try and fix this issue or is it just a corrupted firmware file? Or can an "invisible drive" be caused...Leave a comment:
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So I managed to make it work. It was, I assume, my mistake in my BGA soldering technique - I underestimated the need for the gentle nudge once the solder is liquified and a proper cooling of the board post-reflow. Once I cooled the board (and chips) down with maximum airflow and minimum temperature the console works. I think not cooling the chips properly made them contract in a different speed than the board and thus they "tore" away from the board after reflow. Fortunately no pads were harmed
PS: After I switched the new 32 GB APCB data in the bios all works correctly....Last edited by Prott; 07-13-2024, 08:03 AM.Leave a comment:
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Hello Badcappers,
could you please help me with fixing this bios for my surface pro 7? It starts up, but can't see the internal SSD drive and - after booting from an external one - has problems with ME (version 0.0.0.0 and shows as not working correctly in the device manager).
Model: 1866/i5/8 GB (JALAMA_ICL, REV: 2.0B)
SN: 049321294453
Thank you!...
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Thank you. Yes, I was following this guide - I even contacted the person who created it, but his conclusion was that one of the modules is probably faulty. Now I have to somehow check which one.
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Thank you! Did you have any luck?
From my additional research it seems like Zen 4 requires all four LPDDR5 modules (4x32 bit bus) for it to function, so I can only assume there's no way to run any code without all four modules working. Is there any other way to narrow down the faulty module? Anything I can probe with a scope? Thank you so much for any help.
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Thank you! However that should not be the case - multiple guides state that there's no need to change the BIOS for the console to boot. You have to only change the bios if you want to use the whole 32 GB and not just 16.
As for the logo - it's stuck at the first logo that displays immediately upon turning on the device. That logo does not come from the actual iGPU. I am not sure how it is done in case of Ally, but for example on Microsoft Surface it is stored in the screen itself and activated by a signal from SAM. The CPU can be completely dead and the logo will still show up. :...Leave a comment:
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[RoG Ally] Fault in one of the onboard RAM chips. Any way to diagnose which?
Hello dear badcappers!
The title pretty much says it all - do you, please, know if there's any way to troubleshoot which of the integrated RAM chips (LPDDR5X in this case) is faulty?
Backstory:
After replacing the 4 onboard (soldered) memory chips on a RoG Ally (4x4 GB to 4x8 GB) it got stuck on the RoG logo. I assume one of the chips is either not soldered properly or faulty. However after reflowing and replacing bunch of them I am still stuck at the same place.
If there is a way to narrow down which memory module is faulty it would make my life much... -
Intel NUC 7i7 - attaching m.2 drive causes no picture output
Hello,
I am getting a bit desperate with this one and would appreciate any help.
I came across a NUC 7i7 that initially had a short on the USB header "rail" (one of the decoupling capacitors). But, besides that, it displays a weird behaviour - if I don't attach anything to the m.2 slot it works great (boots into windows, etc.). However once I plug in an m.2 drive the computer won't display anything on the screen.
There's no picture, but the computer is still working (I can turn on/off numlock, etc.). This behaviour remains the same even if I disable... -
UPDATE: Cleaned the ME myself, the NUC is now working. In case it helps anybody else I am attaching the working clean ME version....
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I guess at this point is more about what the repair shop can do. Swapping a CPU won't be a cost effective option. Like you said, swapping the motherboard for a fully functional one might be the best bet.Leave a comment:
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Did you try the bios from minhdigital? That one is working for me. Also:
- What programmer are you using?
- Are you desoldering the bios chip or programming in place?
- Did you first cleared the chip before programming and verified it afterwards?...
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Hi, there can be multiple reasons why Surface won't boot. It can be any hardware fault preventing the Surface from finishing the power on sequence. Desoldering a CPU is the absolutely last resort when everything else fails (and is usually not even economical due to the cost of the CPU itself as well as the time spent on the exchange).
I would suggest to:
1. Check the resistance of all the coils - is there any that's low?
2. Find the power on sequence in the schematics and measure all the signals in order to see where the sequence stops. Then you can narrow it down to...Leave a comment:
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Discovered that the original attached file was badly extracted. Here is the proper one.
S/N: BTDN9320085T
Model: BLKNUC7i7DNKE
Thank you. It would be a huge help....
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UPDATE: Indeed, it is a dead ssd
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My apologies. Fixed
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NUC BLKNUC7i7DNKE bios
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 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.
S/N: BTDN9320085T
Model: BLKNUC7i7DNKE
Thank you so much!...
Last edited by Prott; 04-16-2024, 08:28 AM. -
My apologies. Please help me fix this bios for Surface Pro 7 (ME error, can't boot from any drive / usb stick, sometimes doesn't boot at all). I can get into UEFI without problems, but it still does not want to boot past that no matter the settings.
Model: 1866 (i5/8/128)
SN: 049321294453
Board revision: 2.0B
Thank you.Leave a comment:
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