Switch OLED no boot or LCD after Picofly

[samjenkins00]

Hi All,

I'd appreciate some pointers if possible.

I recently attempted my first Picofly install, I used the kamikaze method on an OLED switch. Everything seemed to go well, continuity and diode check all passed. I did have some issues tinning the dat0 via but I got there in the end and diode check worked.

On first boot I got the blue led followed by some yellow error blinks. I also tried to boot OFW but just got a black screen.

I've now removed 3v3, CMD, CLK and DAT0 (unsoldered at the motherboard end), and unplugged the SP1/SP2 ribbon (ribbon is still soldered to caps).
I still cant boot into OFW.

I've tried charging the unit, I used a thermal camera to see the board warm up and the battery start to heat - so it would appear the charging circuit works.
I've tried USB-C into windows (with and without battery connected), I get nothing at all - I was expecting the APX mode.
I tried disconnecting the LCD ribbon in case this was pulling something down.

Any idea where I should go next? Could this be a dat0 issue? Or more likely to be a power rail issue?

Cheers.

 

[thesjaakspoiler]

It can be a ton of things but the first thing is to look for damage to the PCB (like a scratched trace) or a missing resistor.
Sometimes resistors burn up inside without any noticeable damage.
With a multimeter test if the CMD/RST resistors show a few kilo ohms.
Look for damage around the shield.

There is a dedicated PicoFly thread at the top of the forum.

The picofly error codes are long and short blinks. Color doesn't matter.

 

[samjenkins00]

It can be a ton of things but the first thing is to look for damage to the PCB (like a scratched trace) or a missing resistor.
Sometimes resistors burn up inside without any noticeable damage.
With a multimeter test if the CMD/RST resistors show a few kilo ohms.
Look for damage around the shield.

There is a dedicated PicoFly thread at the top of the forum.

The picofly error codes are long and short blinks. Color doesn't matter.

Thanks, I've now completely removed the picofly and all extra ribbons and wires. I still had the RST line connected to the pico (which was powered down), so i suspect this may have been holding it in reset.

It still doesn't boot, but I now get the APX mode when I connect to a PC. Does this suggest Dat0 disconnection?

 

[bobonthejob]

Hey mate, i too have a thread open for similar. Done the mod and i just get black screen no matter what i try. Removed the mod completely and still get a black screen. No idea what to try next.