I bought AMD Athlon X2 5000 Socket AM2+
After I change the CPU the machine didn'n boot. Only cpu fan started. No beep, no display.
After changing back the old Sempron CPU all plays fine.
I repeated three times the change, same result.
Also I updated BIOS from R01-A0 to R01-A1 dated 06/25/2007
There is a newer BIOS version R02-B1 available in Acer ftp-site, but the winflash bios loader didn't accept it to upgrading.
I've found that Acer M3100 would accept AMD Athlon X2.
I wonder if there are some jumper settings or similar before cpu can be upgraded to Athlon X2.
No. Winflash is tricky to get working. I downloaded the file and saved it to the documents section. Can't remember if you have to unzip it first. Had to disable "boot block" setting in the bios, then change some security settings as they came up on the screen to get it working. It's very difficult to upgrade the cpu on an oem board by acer, dell, etc. They aren't designed for upgrading, and don't give you any info for a flash program when it's available. I would leave it alone, unless the m3100 works with the 5000. With winflash, you may have to manually select the bios file when prompted by the flash program. With some boards, it's not automatically detected.
I updated my bios for my Veriton M410. The M410 series all use the same motherboard and AMD Chipset. The new bios is R2-B3.bin. You do have to boot into setup and unlock the bios upgrade feature (Near the bottom of the bios page).
Winflash worked perfect and I used it to backup R2-B30S. I am going to clear bios and cmos today and put the original bios R2-B30S firmware back into the bios chip----the new bios changes our computer's name to Aspire. Though the bios looks identical to the original, if it changes the name of my computer then it may have some changes to the I/O in more significant ways, like CPU fan speeds etc. I didn't notice any change in my systems performance so I don't feel I need the new bios.
One thing about Acer knowledge base--they don't provide FAQ's like other OEM's. It would be nice to find a .pdf on what changes are in the updated 2009 version of bios R2-B3.
Just remember to boot to bios first and unlock it so you can use Winflash.