SUPABOY-S (HYPERKIN) no video output

Hello everyone ,

I have one SUPABOY-S with no video output.
Here is symptomes :

• No video with Original screen. Screen shows only blue color.

• No sound (when cartridge inside)

• No video output with RCA cable

First of all I bought a new IPS screen. New screen change nothing, still no video.
Nothing on PCB board's seams to be burned (capacitors, resistors...)
I tested all resistors and capacitors with multimeters.
Some of them shows me wrong value, like resistor R22 (33ohm)

I remplace it with new one but nothing change.

I can not found schematic with list of all components.
I contacted HYPERKIN to ak-sk them schematic, they sad me that don't have it

Not sure if it can help if I order AMT630A (video decoder) and simply replace it with new one, or it have to be programmed before?


Or maybe change CXA1645M (RGB decoder) by new one?


I tested Diodes,
D1 (big black SS34 = BARRIER RECTIFIER ) and D2 (small) show's me value in both sides (what is not normal)




Can somebody help me to issue the problem, please.
Thanks for all.






Original screen :


IPS new screen :

Statistics: Posted by Kayumba — Fri Apr 05, 2024 5:29 am — Replies 0 — Views 130

---