Screen issue with lynx 2 does power and have sound some picture

[DRIFTY]

Hello 

 

Need a bit of help here

So I got hold of a lynx 2 when I first got it had blank screen with sound and back-light but no picture. So I went ahead and replace all the Capacitors , went over all the pins with iron, reflow the two big chip and ipa the whole board.

 

Now when I first fire it up it showed a very cleared screen with color. after playing for an hour then switching it off and return to it 7 hours later it gone to this in the video no matter what I do I can't get it back in to good mode

 

Any ideas?