Hacking Hardware Bad ram after installing Instinct-NX V6S?

[Greasson]

New Switch Lite, instinct NX-V6S, triple checked all the soldering with multimeter and everything is OK, but the screen glitches as picture when trying to load payload.bin (Hekate and others) from microSD.
- Inserting a microSD without any payload.bin gives a warning about not able to load it.
- Booting without microSD, appears the classic no SD card of the Instinct NX load screen
- Trying to boot to OFW gives a blue screen.
- Tried different micro SD format/brand/size too but nothing changed.
- Tried to reflash firmware 2.0 and reset the instinct NX chip but nothing.
- i was able to boot UMS-Loader as payload and did a full dump (not Boot0/1) using NXnand manager 5.2.1, so i hope this means the eMMC is OK.

BTW still BSOD with OFW and corrupted screen with any payload apart ums-loader.

Instinct NX console:
> v
Board ID: OLED
SoC detection successful:
eMMC CLK ok: yes
eMMC CMD ok: yes
eMMC DAT ok: yes
eMMC PKT ok: yes
SoC type: Mariko
Device voltage:
Erista rails: 1300
Mariko rails: 1638
FPGA ID: INSTINCT

Pressing "d" on console, the verbose at the end says the Glitch is successfull but screen is always as pic.

Can it

be a problem with the ram modules, even if i didn't touch them.

 

[thesjaakspoiler]

Could indeed be a RAM issue.
Hekate doesn't care whether your emmc is broken or not for running Hekate.
And blue screen in the OFW do mean the Switch is freaking out about ram/emmc very badly.

Maybe check for scratches around the CPU shield.
The traces are tiny so even with a normal screwdriver you can easily damage them when removing the shield of the CPU.
Another stupid trick is to put some moderate pressure on the RAM chips while booting.
This might give a hint that they detached themselves from the PCB.

 

[Greasson]

Thanks.
I already tried the "pressure" trick but no luck, also checked for scratches and i can't find any.
About eMMC, using ums-loader i was able to dump it, so i think is OK.
I will send the Lite to a repair shop, i hope it's the RAM "only".

 

[Greasson]

There's any minimal payload like ums-loader that can test RAM?