Portable TV displaying whitescreen instead of static

[yekwart]

Hi

I have a Sanyo portable CRT TV that is having a problem with it's display. When I turn this device on in the past it used to display static, but now only displays a white screen with a slight darkish area off center. Does anyone here know what might be the problem?

It's an old device so I thought a capacitor or something might have gone in it, however, I thought it best to ask here before I pull this thing apart to check to see if anything obvious is wrong on the inside.