Dell G5 15 5590 - No ram detected ( 2,3 )

[Healdealer]

It looks like i did a mistake when changing some settings for the ram with setup_var_3 commands in grub.

First it worked all for unlock undervolting, but then i changed the frequency or i used a wrong var value..

Now no boot and no screen.

Led code 2 amber 3 white no ram detected.

I installed 2 different new ram but no luck.

RTC reset not helping
Cmos reset not helping

I tried everything what the manual say and what i could find elswhere.

Is there a possibiliTy to revert my mistake ?
Why is RTC and cmos reset not fixing the wrong Settings ?

Is it only possible to fix by reflasjing the hios directly on the chips ?

If so, can someone please link me something ?

CoUldnt find a guide for this notebook nor where to find the bios chip. I think it has 2 bios and ec ?

Is it possible to flash them without soldering or do i have to replace them no matter what ?

Could there be anything irreparable to fix after setting some wrong var value ?

It was either the frequency i set wrong, or better to say i think i used the wrong command/value, or it was rtc lock enable..

Thanks !

[fauzanmint]

did you try enother ram?

[Healdealer]

did you try enother ram?

Yes, installed 2 new different rams but none worked.

Is it necessary to do a rtc/cmos reset when installing a new ram each time orshould it at least detect them and change the led code ?

[mcplslg123]

RTC rest is not necessary while swapping ram stick. Your bios is very likely damaged due to wrong entry.
So the only solution is to take backup of your old bios and make a request for fresh bios in "Bios Section".
You will need an spi programmer like RT8209F or similar.