Have an Aspire with a non-working keyboard. I have 3v at pins 19-26 of CN12 (p. 22) like I believe I'm suppose to. No shorted capacitors at CP1-6 (also p. 22). Power at CN12 is coming from the KBC, correct? Maybe I just need a bios flash? Keyboard itself is new.
Acer Aspire M5-481PT keyboard issue
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Re: Acer Aspire M5-481PT keyboard issue
Have no voltage on U28 (p. 8) at pins 4 (ground), 5, or 6. Problem? -
Re: Acer Aspire M5-481PT keyboard issue
Really need a bios dump now, was gonna upload the current file but my programmer can't even id the chipComment
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Re: Acer Aspire M5-481PT keyboard issue
before all do clear cmos, remove batt and dc adaptor
is your laptop operational? can it boot to win? try flashing from windows... what version of bios is currently on it?
by looking at website and reading a little, this laptop is a little tricky, it has 3 versions v1.15 should be used on win7, v2.16 and v2.22 came with same laptop with preloaded win8
maybe wrong verion is flashed, so thats why kbd is not working
anyway, do not flash bios if you cannot id chip, probably you wont be able to flash properly, and always make backup of your current rom, it can save you a lot of troubles
check your cables and connectors, maybe that why you dont get id :/Last edited by ala_borbe; 12-10-2014, 03:19 AM.Im Back... sort of...Comment
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Re: Acer Aspire M5-481PT keyboard issue
before all do clear cmos, remove batt and dc adaptor
is your laptop operational? can it boot to win? try flashing from windows... what version of bios is currently on it?
by looking at website and reading a little, this laptop is a little tricky, it has 3 versions v1.15 should be used on win7, v2.16 and v2.22 came with same laptop with preloaded win8
maybe wrong verion is flashed, so thats why kbd is not working
anyway, do not flash bios if you cannot id chip, probably you wont be able to flash properly, and always make backup of your current rom, it can save you a lot of troubles
check your cables and connectors, maybe that why you dont get id :/
I thought I had a keyboard issue. Tried external usb keyboard to get into bios, F2 didn't work. So now I don't know if there was a keyboard issue or I just didn't input the correct button combo to get into the bios.
When I removed the bios chip to upload the current file on the chip my programmer couldn't identify it. I've got the same chip I can take from another board but how do I get this thing to fire up again?Comment
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Re: Acer Aspire M5-481PT keyboard issue
Removed cmos to check voltage of it (was only 2.5v, got a new one coming), reinstalled, and now board won't start. Can low voltage on cmos cause this?Comment
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Re: Acer Aspire M5-481PT keyboard issue
Sometimes yes. But all boards should power up ok without CMOS battery installed.Originally posted by PeteS in CARemember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.Comment
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Re: Acer Aspire M5-481PT keyboard issue
That's what I thought but removing and reinstalling the battery is the only thing I did between it starting and then not starting. Guess I'll know for sure when new battery shows upComment
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