I have just recently acquired an Acer Aspire X3810 desktop. When I first powered it up it proceeded normally except for a hard drive problem. Switched to a known good hard drive and then no power. I seriously doubted a power supply failure that quick but was very concerned about the condition of the motherboard. It looked as if I had been subjected to a roach infested area and this has left some serious "grungy" looking areas all over. I unplugged the connections from the power supply to the motherboard and blew them out with compressed air. Then the computer powered up but I have no video. The computer would be worth the time and effort to see if a good thorough cleaning would fix it but after reading several posts regarding how others have approached cleaning the motherboard has left me still looking for the proper way to proceed. I have read where hard bristle paint brushes have been used sometimes cut at an angle to help reach the hard places. I even think a toothbrush could also be used. The main question is to what to use as a cleaner. I thought about some type of electrical contact cleaner but not many people mentioned that. Most posts suggested the use of alcohol (rubbing alcohol I think) and even one suggested using de-mineralized water which I don't think would be wise in my circumstances. On e-bay I saw a "Misty contact and circuit board cleaner" but I can't seem to find any reviews for it anywhere. I have an air compressor to use as a finishing touch to blow out the final debris but would anyone have any advice as to the best cleaning agent to use for the best results? I would greatly appreciate advice on this especially where someone has used a specific cleaner having good results. Thanks in advance for any responses.