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First things first, is the power correct and stable? Have you checked/replaced the capacitors? If not, check it first.
From the look of your glitches, i'd say it's either VDP2 or VDP2 VRAM. Cold solder is probably not the case, because the soldering was done with a wave. More probable scenarios are dead caps, scratched PCB tracks and shorted pins.
Multimeters can lie, especially with a thick probes on a tiny QFP pins. Do not apply the pressure to QFN pins unless you're ready to replace the chip with a donor from some dead PCB. |
im so happy. It was the vdp1 rams. I reflowed them and picture become normal.