PSP 3000 action buttons (□△○x) not working, lets fix it!

Don't forget to check out PCBWay at www.pcbway.com for the 10th anniversary celebrations! This PSP cost me $55 aud and it wouldn't get past the initial setup screen due to faulty action buttons (□△○x)
Parts used in this repair
Button Pad s.click.aliexp...
Battery s.click.aliexp...
Tools I use quite frequently for repairs -
Multimeter s.click.aliexp...
USB A/C amp meter s.click.aliexp...
Soldering station s.click.aliexp...
Desoldering braid s.click.aliexp...
Tweezers s.click.aliexp...
Flux s.click.aliexp...
Grinding Pen s.click.aliexp...
Board holder s.click.aliexp...
Screen clamps s.click.aliexp...
Screen pry tool s.click.aliexp...
flat screwdriver s.click.aliexp...
tri point w tweerers s.click.aliexp...
solder s.click.aliexp...
solder iron s.click.aliexp...

[@rune3pro]

Waiting ages for this!