Asus eee 904ha running 'legacy' windas XP.

Been working OK for years.

Very recently after booting into windas after a couple of minutes normal use, the screen goes bananas,scrolling, breaking up etc, nothing appears to respond except the off button.

Switch off switch on and similar but happens sooner, repeat power cycle few times in vain until nothing appears on screen :*( I also noticed HDD led doesn't behave as usual (it would be busy loading windas if just the screen was off for e.g.)

Any pointers please?

Jim K