Acer DAA75L Aparker motherboard, CMOS error

[yoritomo]

Hello all

I have a small desktop computer, Acer Aspire, no model number on it, label has been removed, but similar to Acer Aspire M3470, at least containing the same motherboard.

When i start it, i hear to fast beeps which means for this model "CMOS checksum Error" on the screen it has the error message "This bios is exclusively for Acer only" and no other mention or possibility to enter the BIOS setup. I did a clear cmos with the jumper.
I found the CMOS battery at 0V, even replacing it, the problem still occurs.
There is a a picture of the Bios area.
I don't know where is the CMOS chip, should i replace it ? Should it be flashed first ?

Then to be sure i drained the motherboard residual using the power button as usual, no luck.

Thank you for your help.

[yoritomo]

Re: Acer DAA75L Aparker motherboard, CMOS error

Hello all

Since yesterday i tried to update the BIOS by the recovery system using a USB stick and the keys CTRL+Home but no luck it never enter flashing.
USB stick is 32GB formated in fat32 and empty, i renamed the rom as AMIBOOT.ROM and AMIBoot.ROM following the service manual, none worked.

[RJARRRPCGP]

Re: Acer DAA75L Aparker motherboard, CMOS error

That Acer message isn't an error and always appears.

[yoritomo]

Re: Acer DAA75L Aparker motherboard, CMOS error

Hello, thank you for your reply

Yes i know, but the 2 beeps is an error post meaning CMOS error, and i mean, only this line of post and the copyright notification appears on the screen, the rest of the Bios loading is suspended.

Should i replace the cmos chip, and will it fix the problem ?
Otherwise, why the recovery BIOS flash fails in this case, is it too early in the BIOS loading to accept a flash procedure ?

[yoritomo]

Re: Acer DAA75L Aparker motherboard, CMOS error

It is sad because it is a small machine but not bad, if i replace the cmos chip does it need to be programmed first ? i never replaced it yet.

[RJARRRPCGP]

Re: Acer DAA75L Aparker motherboard, CMOS error

Looks like the battery tab is the likely culprit...

[ala_borbe]

Re: Acer DAA75L Aparker motherboard, CMOS error

try now cmos battery and try other ram
i know it sounds silly but for me 2 or 3 times fixed this msg

[yoritomo]

Re: Acer DAA75L Aparker motherboard, CMOS error

RJARRRPCGP

The battery socket has no problem, the power is going on the motherboard and no broken tracks.

ala-borbe

I replaced the battery already and the rams too, but no luck it still be always the same.

[jasko_jacker]

Re: Acer DAA75L Aparker motherboard, CMOS error

Only a reprogramm bios with programmer should solve this issue, if you make a software bios upgrade with fpt for example not erase all old bios