Hi,
My ProDesk 405 G4 got a problem when powered on, it blinks 5 long red and 7 short white. I checked the manual and cannot find 5.7 means but 5 long red means mainboard issue. CPU and RAM attached/de-attached same issue. CPU and RAM tested working fine. I dumped the BIOS and it looks fine. But cannot flash new bios from the HP website due to the bios file size being bigger than the actual NAND flash.

The Mainboard serial is DA0F82MB6B0 and I searched google the model is somehow HP EliteDesk 705 G4 35W Desktop Mini, are they the same?...

Re: New Members - please post your introductions here

Hi, it's me from Vietnam. I found this site pretty much helpful. Great community and hope everyone have a great time here.