Black Screen on AES 3-6

[Tathan]

Hey folks! I've been messing around with my AES for quite a time after dreaming of it during all my childhood but... It looks like I'll have to wait a lil' bit more before to enjoy my dream.

I've been trying to do all by myself but now I'm stucked and need your help.

Months ago, a friend of mine said he didn't needed is AES anymore because he had to recap everything and hadn't got time for that. I then bought it from him for a good price and also ordered all the stuff I needed to have my Dream AES (cables, unibios, condensators,...).

I also planned to do an RGB mod, because I know that 3-6 has the jailbars issue. Here's the mod I wanted to do : https://www.retrorgb.com/aes-rgb-bypass.html

I received the console had a black screen and a really distorted audio. The reparation began.

1. Full recap and RGB Bypass
   Still no image, but I can hear a really proper "Oniii Chan" from my game
2. I know that some AES need different cables because the C Sync can be on a different pin, that's why I ordered one on retrogamingcables.co.uk
   Same results
3. As I was a little bit lost and just to do something, I installed the Unibios
   Still no image, but I can hear now "Big Bro!"... At least, the bios is good

And here's where I am stucked now. I checked my continuity everywhere and it "looked" okay, I checked my resistors with the ohmmeter and they're ok too... Where could I check for an issue? I'm a little bit noob with the AES and don't specially know where's GND/5V/... and so on, so I would definitely need someones help because I can't find any other problem by myself.

Oh btw, I tested it on 3 different screens, 2 FHD LCDs and a B&O MX4200. Always with the same results.

If you've got an idea, let me know! I'm totally stucked. I join some pictures of how my console looks like, if you need more pics, just let me know!

Thanks in advance!

NB: Just to test it, I also tried using my CDZ cable (modded for the composite audio). Didn't worked neither.

 

[Tathan]

Here's my continuity test, the numbers on the screens are the number of every pin.

I can also find the c sync on number 20 and because of the rgb bypass, there's continuity between c sync and cvbs...

Any other idea? Thanks in advance!

 

[Tathan]

And here's my pinout (sorry for the triple post)

 

[Xian Xi]

What power supply are you using? This is a non-5v console, use a 9-13v power supply with at least 2A output for buffer.

 

[Tathan]

What power supply are you using? This is a non-5v console, use a 9-13v power supply with at least 2A output for buffer.

Hey, thanks for the answer!

I sent my console to a guy I follow on Twitter who usually knows a lot about repares (seeing that I couldn't find a solution by miself).

I sent him the cable I was using too, if I'm not mistaken, it was a 12V 2A with inverted polarity. I had seen on the internet that it was the power supply needed for this kind of AES (it was Pro POW 3 or Pro POW E if I'm not mistaken)