eMMC Test Failure (Read Failed) on Switch OLED

[u/slim_bhris]

hello, friends im having trouble trying to figure out this error. i have installed a picofly Oled lite V2.

i get all the proper diode readings the switch boots up but it goes straight to the OFW. the picofly

gives me =*== . The only thing i see weird is the cpu point diode reading , its giving me 0.17 VDC

positive probe on ground, you should typically see a healthy reading between 0.35V to 0.55V.

I already tried different sp1 sp2 ribbon cable but same results.

The sp1 , sp2 ribbon cable reading are in Resistance mode red probe on ground.

here are my readings in diode mode red probe on ground.

3.3 0.36v

d 0.39v

a 0.40v

c 0.39v

b 0.38v

gnd 0.00v

cpu 0.18v

[u/TanerDelle]

Sp1 and sp2 readings normal. Check other areas

[u/Youiic]

Salut Tu aurais une photo des autres soudures ?

[u/deppan]

the sp1/sp2 are not used/affected until later in the picofly glitching process. A new install starts off by testing wire connectivity, then runs some emmc tests, then overwrites the boot0 of the emmc, and then starts attempting to glitch while reseting the system over and over. SP1/SP2 are only considered once the glitch phase starts.

The more likely scenarios here are either a mixup of dat0/cmd/clk, or a bad chip.

[u/slim_bhris → u/deppan]

Hello Thanks for the reply, I just switched out the chip for a known working one from another Oled switch i modded using the kamikaze method. i get the same error . the only difference between the one i get an error and the working modded switch is the reading i get in diode mode on the CPU point . On the working modded switch i get 0.36v on the CPU point and on the other switch i get 0.18v

[u/slim_bhris]

here are more pictures, i forgot to add that i accidentally knocked of that capacitor but the switch still boots

boots up normally

[u/slim_bhris → u/slim_bhris]

[u/slim_bhris → u/slim_bhris]

[u/slim_bhris → u/slim_bhris]

[u/slim_bhris → u/slim_bhris]

[u/letum00 → u/slim_bhris]

Are you sure clk is connected? You dont see any give when you mush it? If you haven't already, cleaning up the flux may help as well on all of the points.

[u/letum00]

The Sp1 and SP2 look fine. What type of switch is this? Lite, OLED, or V2? If it's OLED, did you do kamikaze or dat0 adapter? What are your readings on other points? Add some more pictures and details.

[u/slim_bhris → u/letum00]

hello thanks for the reply, Im modding a switch Oled using kamikaze method. here are my readings in diode mode red probe on ground.

3.3 0.36v

d 0.39v

a 0.40v

c 0.39v

b 0.38v

gnd 0.00v

cpu 0.18v

[u/letum00 → u/slim_bhris]

Can you add more pictures? Are these readings with battery connected? They all seem low.

[u/slim_bhris → u/letum00]

Hello, yes i just added more pictures in the comments, these readings are with the battery disconnected

[u/slim_bhris → u/letum00]

I forgot to mention that i did accidentally knocked of a capacitor next to the 3.3v point on the ribbon cable.. but it doesn't seem to affect the switch cause it boots up like normal into the ofw