acer 7520g no boot after bios post

[jasko_jacker]

acer aspire 7520g:
(I don't know well amd system)
I can enter to bios, modify boot option, etc but after bios post , the system remain with cursor blink and no boot even with a usb boot pen or cd rom.
I reprogram the bios
and removed all unnecessary peripherals but the issue persist.

[jasko_jacker]

Re: acer 7520g no boot after bios post

A full bios post show:
RESOURCE CONFLICT - pci serial bus controller in slot 01
bus: 01, device: 04, function: 01
etc
The problem cames from this chip Ricoh R5C833
I try to disable it

[jasko_jacker]

Re: acer 7520g no boot after bios post

after I removed that chip, the system behaviour is correct , I have not time to replace it but i think the culprit is NVIDIA MCP67 a common issue on these boards.