Picked up a IBM 5140, noisy lcd screen?

[pcm2a]

I picked up a pretty sweet IBM 5140 for a big $20! Came with the bag, psu and a non IBM printer. No extra parallel/serial adapter which is a bummer but it does have 640k of ram. Both floppies work and you can see the application selector running in one of the photos. The battery still holds a charge but only for a minute. Clearly they don't make batteries like they used to...

The lcd screen is noisy. There is an audible noise that increases as I increase the brightness and is almost gone if I turn the brightness all the way down. How concerned should I be about this? Is a capacitor about to blow any minute...

Any suggestions on some awesome games to try out on this thing?

 

[NeXT]

That sounds like whine from the LCD inverter. Whine from it is normal. If it was a capacitor the voltage would collapse and the backlight would cut out before things start blowing up.

 

[pcm2a]

Thanks, that is great to know that I can leave the backlight up without worrying about a nuclear explosion.