My problem is I traded a friend some paintball gear for a Goldstar scope that he bought new and never really used. I didn't really have the space where I was living at the time to set it up so it sat for a couple of years. When I finally moved I started setting up shop and the scope worked great. I had a workbench out in my garage and I put the scope out there which was probably a bad idea as it gets pretty dirty out there with me cutting wood and grinding metal all the time. The scope sat unused on my bench for a little while and before using it again I was afraid some metal shavings or wood dusty might have gotten into the scope so I took off the cover and blew it out with the air from my compressor. It was unplugged when I did this. I let it sit for a little so any possible moisture would evaporate and then tested it out and the scope worked fine. The next time I went to power it up however the power led came on but I get nothing on the display, no traces at all. I have fiddled with all the controls and powered it on and off several times but nothing. With the cover off, when I power it up I can see some of the little tubes/diodes inside light up for a split second when I hit the power button, but then they go out. Any help would be greatly appreciated as it is not an old scope and is otherwise in brand new condition. It is analog not digital and I will post the exact model when I get home tonight. If I need to start a new thread, which I probably should have, I will, but I just need someone to point me in the direction of someone who can help. I would hate to junkt this otherwise great 300Mhz scope.