HP Probook 455 G1 paperweight
Hello, thanks for letting me into the fold.
At work I have been volunteered to look after the laptops we use as diagnostic platforms for various motor vehicles, one of which is an HP Probook 455 G1.
Whilst updating the software, the HP update centre thingy said there was also a BIOS update required. I set this going but when I next looked, the screen was black and the white power light next to the power in jack was flashing (steady flash every half a second or so). I left it for a bit to see if it was just still updating but it never recovered.
Assuming it was a corrupted BIOS I have tried all the usual tricks (battery/power out, hold power on, connect power, press windows + V/B, USB bios recovery etc.) and I spoke to HP who said it sounded like a corrupt BIOS and it would need a new board at £350 odd. I have even tried using a CH341A programmer but I can't get the new BIOS (downloaded from this site and others) to verify properly and the fault persists.
I would like to ask if anybody here has a working knowledge of this particular mobo and if anyone has any clues what the cause(s) could be and what to look for (could it be badcaps or is it more likely BIOS etc?). If you need any more info, please ask and I'll try and find out. Many thanks.
At work I have been volunteered to look after the laptops we use as diagnostic platforms for various motor vehicles, one of which is an HP Probook 455 G1.
Whilst updating the software, the HP update centre thingy said there was also a BIOS update required. I set this going but when I next looked, the screen was black and the white power light next to the power in jack was flashing (steady flash every half a second or so). I left it for a bit to see if it was just still updating but it never recovered.
Assuming it was a corrupted BIOS I have tried all the usual tricks (battery/power out, hold power on, connect power, press windows + V/B, USB bios recovery etc.) and I spoke to HP who said it sounded like a corrupt BIOS and it would need a new board at £350 odd. I have even tried using a CH341A programmer but I can't get the new BIOS (downloaded from this site and others) to verify properly and the fault persists.
I would like to ask if anybody here has a working knowledge of this particular mobo and if anyone has any clues what the cause(s) could be and what to look for (could it be badcaps or is it more likely BIOS etc?). If you need any more info, please ask and I'll try and find out. Many thanks.
I plugged the laptop in and the power button lit up an the fan started spinning and after a bit of fiddling with the internals (swapped ram between slots etc.), I got it to boot! I then spent the next 5 or 6 hours trying to remove the 'product information not valid' screen during POST 
(got there in the end - thank you bloggers and you tubers everywhere! 
). I have spent most of the day tinkering with battery charging faults and updating windows etc. (and found the laptop is subject to a free battery recall too - bonus!) and it is almost back to normal 
I just have a virtual COM port start up error (code 10) left to sort out now, then I think it'll be as good as the day before it died (even better when the new battery turns up).
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