PSone Artifacts and Bleeding

[sdodd91]

I pulled out my PSone for a project earlier today and when i booted it up I noticed the SCE screen was rather "bleedy." I threw in a game, Crash Bandicoot, the naughty dog logo in the intro animation was covered in artifacts and eventually turned into a mess of pixels that had no resemblance of the actual logo.

"Bleedy" Splash Screen:



Being at home on break and having left most of my tools at college, I made use of my resources and removed the modchip from the system, and hit the motherboard with a heat gun for a short period of time, plugged it back in, booted it up, and the screen looked normal, no bleeding, until the system had cooled down again.

Heated Board Splash Screen:



Once the system cooled down the problems came back.

Does anyone have any idea what I should be focusing on repairing here? Chips in particular I should try to "reflow" when i obtain my flux pen?

EDIT: image resize

[Haunted360]

Very interesting.

First off, did you try giving the MULTI AV cable a good wiggle while the PSone was on?

[sdodd91]

Yes I did. I'm pretty sure it isn't a loose connection with the multi a/v cables. There is some pretty bad graphical glitching, not just screen flickering and bleeding.

[Haunted360]

Okay, well if it is a PSone,

open up the case, take out the motherboard so there are no metal plates or shields on it still, place it on a table (wood / plastic of course) and turn it on with the AV plugged in and the power (you dont need to have the CD-ROM connected).

Does it still show artefacts?

[marshallh]

Sounds like you have some analog filter related problems. Best guess would be any sort of electrolytic capacitors along the video path. They are all SMT inside there I think. I will have to have a look at one of the circuit boards, might do that when i have some more time.