Hardware Black screen, TegraRCMGui freezes after payload injection w/ AutoRCM

GarnetSunset · Jun 20, 2021

Here's a quick rundown of what I've tried thus far.

Code:

hey so im back to try and fix my old issue with my old switch
[3:15 PM]
autoRCM works, but once i push a payload, nothing happens
[3:16 PM]
its 100% an unpatched payload, was working until recently
[3:16 PM]
switch*
[3:17 PM]
what ive tried: atmosphere, hekate, lockpick
[3:17 PM]
all black screen after pushing
[3:19 PM]
when using tegrarcmgui, memloader, biskeydump both freeze and crash the app
[3:19 PM]
all payloads with fusee launcher push and say "we think it worked!"
[3:20 PM]
is there any paylaod i can push that would do something like, put a file on the sd card?
[3:21 PM]
im willing to bet its not the display

I've tried usb 2/3, diff ports, cables (One of the 2 usb2 pads on the switches usb is torn so only one side works).
Anyone had this issue?

Sits at .41 amps and doesnt change after RCM

ppzikos · Jun 21, 2021

hi , all payload > black screen ?
tegraRcmGUI say 0x7000... ? or 0x000...
and in OFW with normal boot it's black screen too ?
is sometimes something displayed on the screen or there is always a black screen?

GarnetSunset · Jun 21, 2021

ppzikos said:
hi , all payload > black screen ?
tegraRcmGUI say 0x7000... ? or 0x000...
and in OFW with normal boot it's black screen too ?
is sometimes something displayed on the screen or there is always a black screen?

all payload black screen, 0x7000, has been autoRCMed for 3 years.
nothing is displayed and the backlight never comes on

ppzikos · Jun 21, 2021

maybe backlight is dead, test with a lighting on the lcd if you see a display.

GarnetSunset · Jun 22, 2021

ppzikos said:
maybe backlight is dead, test with a lighting on the lcd if you see a display.

nothing i can see , no display or backlight comes on, and payloads also fail

ppzikos · Jun 22, 2021

the switch took the water?
see if you have shorts on the caps around 2 max 77621 and max 77620

GarnetSunset · Jun 22, 2021

ppzikos said:
the switch took the water?
see if you have shorts on the caps around 2 max 77621 and max 77620

as for the water question, I don't think so no, but ill look for those, is there a diagram?

GarnetSunset · Jun 22, 2021

here's a video of what ive tested including what you said

GarnetSunset · Jun 23, 2021

another one

ppzikos · Jun 23, 2021

first video the max7621 between nand & soc is short , this short is power rail for gpu on soc ( green on my picture )

and in video 2 before 40second is pink on my picture !
after 40 second in video 2 is same rail at first video (max 77621) in green
ok two short , maybe there is 2 problem but , i think ball of soc is dead or , maybe thermal pad is conductive ( not an original thermal pad ?)

GarnetSunset · Jun 23, 2021

ppzikos said:
first video the max7621 between nand & soc is short , this short is power rail for gpu on soc ( green on my picture )

and in video 2 before 40second is pink on my picture !
after 40 second in video 2 is same rail at first video (max 77621) in green
ok two short , maybe there is 2 problem but , i think ball of soc is dead or , maybe thermal pad is conductive ( not an original thermal pad ?)

It's definitely original, as I've never taken it apart, but I can look under the cover

ppzikos · Jun 23, 2021

if you have never disassembled it's not thermal pad the problem.
maybe that a child has stepped on it ? and ball under soc have short.
you can remove max77621 or caps , and see if short but i I think the soc has a problem

Hardware Black screen, TegraRCMGui freezes after payload injection w/ AutoRCM

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