Took my slim psp out to use after not using it for a long time and there are some weird blotches on the screen . Here's a picture I know 100% nothing has been spilled on it and that's just one corner (worst place), there are a few other odd spots on other parts of the screen. So I can only assume, condensation or something has got in there, dried and left the marks behind. They're not on the faceplate as I've had it off and they are not on the surface of the screen either. So that leaves either the back of the lcd, the backlight or just a strange failure of the lcd . So just wondering before I dig a bit deeper and see if I can get what ever it is causing the, shadows I guess, cleaned off. Any one else had or seen something similar? if so how did you get it off, (was it on the backlight, back of the screen etc) or can just say it's a lcd failure of some kind and I'm wasting my time and need a new screen. Also while on screens, £30 or so for a replacement, that the going rate of them or can you get them cheaper? as the 1000 and 3000 series seem to be much cheaper . Thanks.