Windows Xp Tablet Helpp

[chevysf]

I have a Windows xp tablet..2005 im pretty sure..
The problem is when i turn it on the screen is too dark like the battery is about to die but the screen settings haven't been touched, and its plugged in.
I can just barely see the Xp start up screen and the desktop is almost impossible to read.
It was working fine until the battery died yesterday, and ive had it plugged in ever since.
Ahh I need some help with this,someone gave it to me and I have no clue about the xp tablet lol
Forgot to add... Its a viewsonic..

[Sid]

I'd need more information to be sure, but it sounds like the inverter might have gone on the LCD screen.

Can you plug in an external monitor?  If so, does that display look ok?

I think you're looking at a fairly typical hardware issue.