Re: HP 250 G5 (LA-D704P with a Core i7-6500U) won't POST

After a little further research, I can see that the PCH is, indeed, part of the CPU as the smaller of the two dies. I have injected 3V as suggested and this die does get incredibly hot almost immediately and the power supply suggests a short.

Thank you piernov for your help.

I will add this motherboard to my donor board pile. I have some more DOA laptops so I might be back for more help!

Re: HP 250 G5 (LA-D704P with a Core i7-6500U) won't POST

Hi Piernov. Thank you for your advice. I don't see a standalone PCH on this board. Has it been integrated into the CPU? I am also not too familiar with motherboard voltage rails - I am happy to try injecting 3V but could you possibly tell me exactly where to inject this?

Many thanks, Bob

Hi everyone, I am hoping for a little help with an HP 250 G5 with motherboard LA-D704P with a Core i7-6500U. I am new to board repair but keen to learn.

I am sorry this post is quite long but I was trying to systematically work my way through things.

I don't know the history of the board – I bought it as part of a job lot.

I have attached a number of photos of both sides of the board. I cannot seem to find a schematic or boardview online.

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Re: LENOVO BIOS AUTO-PATCHER for Supervisor Password Removal

Hi.

What a great forum. I am glad I found it.

I wonder whether someone would be kind enough to have a look at the attached BIOS from a Thinkpad X240 (original, unpatched). I used a CH341A to extract the BIOS. I dumped it three times and compared the dumps with HxD - they were all identical and the CH341 verified the dumps were the same as the chip.

The CH341 then "fried itself" with a "fizzle and a pop" when I was writing the patched BIOS back to the chip....