You might have a solder splatter on the GIF bus. It's the connection from the Emotion Engine chip (EE) to the Graphics Synthesizer (GS) chip. There's a bunch of 42 ohm resistors there. Also one of the resistors might be broken.
Or it's also possible that you damaged one of the RDRAM (Rambus Ram memory) chips with static electricity.
I lost a japanese V5 once that way... Man it sucked ..
Edit: judging by the white bars on the scren I'd still give a through check on the GIF bus resistors as they might cause communication errors which can lead to such kind of graphical corruptions.
Ram failure can cause graphics corruption too but I don't remember seeing white strips on machines which had faulty ram...
Try to reach the memory card menu and see if it can load all the icons. Machines with faulty ram usually crash at that screen when a MC fill the screen with 3D icons...
SCPH-10000_GH-001 SCPH-15000_GH-003 SCPH-18000_GH-008 SCPH-30001_GH-005 SCPH-30000_GH-016(V4) SCPH-30001_GH-010(V4)
2xSCPH-10190, 2xSCPH-10350, 2xSCPH-10280
"**** j0 hackers!"
-Sjeep (As seen on TOXIC OS ELF...)