Some may have a flickering screen (sometimes more, sometimes less).
You can easily see it that when you press left or right in the menu, with each press it flickers a bit.
Only happens when you use batteries, so it might be a battery consumption problem (which might as well be fixed with next firmware update, as the gp2x won't use that much power anymore).
But: As it has something to do with resistors and currency, I remembered the coating on the battery contacts.
If they have a high resistance, power may drop and screen may flicker.
So I scratched off the coating (so that the contacts are crystal clear) - and apparently, the flickering got better.
If you have the same problem, you should definately try that.
You can easily see it that when you press left or right in the menu, with each press it flickers a bit.
Only happens when you use batteries, so it might be a battery consumption problem (which might as well be fixed with next firmware update, as the gp2x won't use that much power anymore).
But: As it has something to do with resistors and currency, I remembered the coating on the battery contacts.
If they have a high resistance, power may drop and screen may flicker.
So I scratched off the coating (so that the contacts are crystal clear) - and apparently, the flickering got better.
If you have the same problem, you should definately try that.