Faulty unit diagnosis (jagged screen)

[Moogzx]

Hello. I am getting screen flickering/jagged screen with a GBS-C I have purchased from AliExpress. It starts off fine but gets progressively worse, sometimes there is no input as well.

Here are some videos of what it looks like:

1. https://drive.google.com/file/d/1mxi4Kt22MOD-SNG_PyCVBe5hdyUHCRmv/view?usp=drive_link (initial boot up)
2. https://drive.google.com/file/d/1-fwgjT3wokYEzrLW82JLoWndyTDhUP0w/view?usp=drive_link (this is after 5 minutes)

These are the settings and how it functions:

1. https://drive.google.com/file/d/15uei-W-lwUMlsSKPywueA2bM6-7pJMAB/view?usp=drive_link
2. https://drive.google.com/file/d/1tV7hKtx7FPI8bh1QQFLwVIJg-m1kLfO2/view?usp=drive_link

I have ruled out the Component cable, PS2, HDMI cable, Monitor. Only thing I haven't ruled out is the power supply to the GBSC, which I believe is fine because it is the standard requirements, and also new (5V 2A) however I have ordered another one to make sure.

I have flashed the firmware multiple times and the same effect more or less occurs on other devices (PS3).

Does anyone know what the issue may be? I am communicating with the seller however its becoming rather difficult to diagnose the issue, as far as i can tell, I may have a faulty unit. Thanks.

[Moogzx]

I have fixed the issue. Faulty power adapter. I will leave this up for anyone facing the same problem.

[Saf98]

I have fixed the issue. Faulty power adapter. I will leave this up for anyone facing the same problem.

What power supply fixed the issue? Can you post the link/specs?

[Moogzx]

5V2A, 2.1 x 5.5mm PSU

I have fixed the issue. Faulty power adapter. I will leave this up for anyone facing the same problem.

What power supply fixed the issue? Can you post the link/specs?

5V2A, 2.1 x 5.5mm PSU

[Saf98]

5V2A, 2.1 x 5.5mm PSU

I have fixed the issue. Faulty power adapter. I will leave this up for anyone facing the same problem.

What power supply fixed the issue? Can you post the link/specs?

5V2A, 2.1 x 5.5mm PSU

Ok my psu is 5v 3a and has issues like in the last link. The fix is replacing SoG caps but this is quite advanced.

[YoImLee]

@Saf98

Replacing the SoG capacitors is a fix for losing sync during bright flashes on screen, having sync issues to this degree usually comes down to either a bad connection on the input side or an inadequite power supply.

• What system and cables are you trying to use?
• What does the log say when you turn on developer mode in the web UI?
• Are you using an external clock generator? If so, what happens when you disable it using the web UI?

[Saf98]

Do you have an example for bright flashes problem for reference? What system and cables are you trying to use? PS2 Slim PAL softmodded (freemcboot). 5V 3A PSU I have generic component cables and also tested with RGC Scart Cable which had even worse result than this. (black screen/choppy). What does the log say when you turn on developer mode in the web UI? I dont see any errors. sometimes i get no signal between switching presets and then sync skipped sfr wrong 0:00 Are you using an external clock generator? If so, what happens when you disable it using the web UI? No difference

[Saf98]

I have fixed the issue. Faulty power adapter. I will leave this up for anyone facing the same problem.

If you still have the faulty psu, can you test it again just to be sure it's not a coincidence?

[Moogzx]

I have fixed the issue. Faulty power adapter. I will leave this up for anyone facing the same problem.

If you still have the faulty psu, can you test it again just to be sure it's not a coincidence?

The faulty adapter was this one: https://www.amazon.com.au/dp/B0C16PS3D7?psc=1&ref=ppx_yo2ov_dt_b_product_details

The one that currently works is this one: https://www.ebay.com.au/itm/295517585138

I suspect the first has a slight variation in voltage that causes the error. I'm not an expert on the topic, so I am unsure. I am convinced this was the cause of the issue, after process of elimination i.e (TV, HDMI cable, PS2, settings etc..)

[Saf98]

I have fixed the issue. Faulty power adapter. I will leave this up for anyone facing the same problem.

If you still have the faulty psu, can you test it again just to be sure it's not a coincidence?

The faulty adapter was this one: https://www.amazon.com.au/dp/B0C16PS3D7?psc=1&ref=ppx_yo2ov_dt_b_product_details

The one that currently works is this one: https://www.ebay.com.au/itm/295517585138

I suspect the first has a slight variation in voltage that causes the error. I'm not an expert on the topic, so I am unsure. I am convinced this was the cause of the issue, after process of elimination i.e (TV, HDMI cable, PS2, settings etc..)

I bought a prebuilt kaico and it has the same issues, psu didn't make a difference. But I plugged in my scart RGC Cable and it worked. So it could be my component cables are really bad. The sync stripper could have also solved the issue for scart. I will update here if a couple quality component cable will help.