Classic wobbly screen and no boot ....

[dwh18]

Got this Classic II and started to do a recap, analog board was a little bit grubby, cleaned all but 5v line was throwing 3.8/4.0 and 12v 8/9v replaced DP3 and DP4 as well as the optoisolator….but no luck and 12v line is now throwing 1v…..any clue where should I go next?
View attachment WhatsApp Video 2025-05-19 at 12.22.38_7bf8487c.mp4