Acer Nitro 5 model A515-51 keyboard problem

[fmajbour]

I have ACER Nitro 5 model AN515-51 main board model LA-E911P Rev 1A after replacing the mainboard keyboard stop working properly.
Some keys not working like Q,Z,C and some keys show deferent chr$ if i press K i will get I press D for F4 key etc...
i have tried all software issues like drivers test the keyboard on Windows 10 and Windows 11 and Linux with same problem.
I have check the keyboard connector on the mainboard every thing looks ok.
Then i replaced the keyboard with new one ......same problem exact same keys problem.
I need your advice if anyone face same problem

[Omar Q]

Hello I'm here for the same issue, but with an A515-52, after replacing the MB the keys do the same as you describe, it turns out the MB I got (DH5VF LA-F952P) is for an Acer Aspire 7 , which according to the seller is the same MB, tried 2 different Nitro Keyboards and both had the same issue, then I tested with an Acer Aspire 7 keyboard and that one works correctly, check what machine model is being reported in the Acer Care Center, chances are it is reporting a different model.
Searching for solutions it seems that re flashing the KBC (KB2099 in my case) with the correct image should do.
checking the forums for the easiest way to do that.

[the Benninger]

tries to make a BIOS update with the latest BIOS on this laptop's support page

[Omar Q]

I tried that with the latest bios for the Nitro 5, it went through but it still appears as an Acer Aspire 7 and the original KB issue persists.

[SMDFlea]

I tried that with the latest bios for the Nitro 5, it went through but it still appears as an Acer Aspire 7 and the original KB issue persists.

The EC will be different.What revision is the DH5VF LA-F952P motherboard

[Omar Q]

hello SMDFlea the MB shows Rev: 1A

[SMDFlea]

hello SMDFlea the MB shows Rev: 1A

Make a backup of your bios and EC ,then flash the bios and EC from a DH5VF rev 1A board

[Omar Q]

thanks SMDFlea I posted on the BIOS requests board as I don't have the image, unless I could somehow get it from the original board which does not power up.

[rogfanther]

Can you try using the chip from the old board in the new one ?

[Omar Q]

Can you try using the chip from the old board in the new one ?

I thought about that, how can I tell which chip is the bios?

[mon2]

Review the topside markings of the flash chips. Google them to find the density and datasheet for each. The main bios will be a higher density part than the bios used for the EC (if the EC is using an external bios). If in doubt, post all markings of the chip(S).

[Omar Q]

Review the topside markings of the flash chips. Google them to find the density and datasheet for each. The main bios will be a higher density part than the bios used for the EC (if the EC is using an external bios). If in doubt, post all markings of the chip(S).

I think this might be the one given that it appears to be a 16 mb
QH128AHIG

here is the pinout in the boardview:

What do you think?

[christian-vr]

Have you fixt the problem? I habe the same problem. After replacing the MB some Keys are not working corretly

[tomp1]

Same here... did anyone solve it?? Reflashing the EC/KBC didn't do the job in my case... anyone have the right EC/KBC file? I got the one from AliSaler. Thanks in advance!!!

[OCMan]

Has someone find a solution? I have same problem on Acer Nitro 5 AMD Variant, board comes from an aspire3; no way to make it work with the nitro5 keyboard, tried flashing EC same thing, maybe its a parameter set by some resistors on the board.

[m1ch43lzm]

https://www.badcaps.net/forum/troubl...-1b-schematics
This is for the intel variant LA-E911P, maybe it's set by Project_ID0 and Project_ID1 resistors, i don't know for sure
RH89, RH91, RH93, RH95

Try to match those with the original board

OCMan, which board number? Same advice could apply, maybe those resistors are labeled differently, check the schematics and boardview to be sure, don't touch VGA_ID resistors

[OCMan]

I will try that, in datasheet, in datasheet for DH5JV, its written R1564 ( and interestingly on the ENE KB9022 page! ) but resistor set board ID to : DH5JV / DH5AV or DH50V and when I flash bios , it tells me my bios ID is EH5JP
there is no mention of the EH5JP variant in the DH5JV datasheet , but even if its a EH5JP variant, on the board its written DH5JV .... compal/acer are really weird !

[m1ch43lzm]

In your case it depends on the value of resistors, if the value is wrong then anything can happen
Measure both R1562 (Ra) and R1564 (RB)

Your board is LA-G021P?