HP150 Touchscreen diagnostic

-----Oorspronkelijk bericht----- Van: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org] Namens Alexandre Souza - Listas Verzonden: zondag 16 januari 2011 23:40 Aan: General Discussion: On-Topic and Off-Topic Posts Onderwerp: Re: HP150 Touchscreen diagnostic Any digital camera can see IR from leds. But if the problem is in the receiver? Use a scope to see the signals on the foot of the IR receiver, I think it is an "easier" way of doing that, beyond using a digital camera (or ANY camera, I can't remember a videocamera with no IR detection) to detect IR emission Good luck! :D You're right but many new cameras have built-in IR-filters with makes them less usable for viewing IR-led's in daylight. The mechanical construction looks a lot like the ones used for HP 16500 LA's only the HP150 use a casing with holes in it where the 16500 LA uses dark IR passing plastic . The touchscreen PCB is bent a little to follow the curves of the screen. This makes it a bit tricky to measure because when the PCB isn't exactly in line with the holes it doesn't work right. So it's a lot easier to diagnose with everything in place, if you know the digital coding of the touchscreen. -Rik