Freebies from the local dump Answered
Well guys, I was tired of being told by different friends of mine that there's lots of goodies to be found sometimes out at my local dump, including a shed FULL of crts, some still in the bag I'm told. I finally got the motivation to make it out there, I had to ask the attendant where to find the computer stuff as the only shed I found had some furniture and old electronics (I was tempted to take this OLD ibm scanner, looked like it was right outta the 80's). She pointed me over to a pile of computer towers, satellite receivers (a scary amount of receivers) and some other crap, all in the sNOW!!! I was a little disgruntled to see it all in the snow there, as there was A LOT of towers. Aside from finding a working 16 port rack mount ethernet switch, a good handful of cpus I removed from some towers, and some PC133 ram (not useful to most, but it has a better use than SODIMM ram ever will these days). One of the first things I seen was an lcd monitor sitting upside down in the snow bank, I ran over to it like it was an abandoned baby in the snow. It didn't look like it had seen the snow too long, so I picked it up and tossed it in the car thinking at the most it would make a nice laptop stand out of the folding base on it. Well upon getting it home, drying it with a towel and letting it warm up to room temperature, I plugged it in and was very EXCITED to see "no signal" faintly on the screen, the backlight was shot.... I got my thinkpad out and hooked it up to see if the entire screen worked and that it wasn't cracked or something, sure enough, the whole screen lit up with the desktop for a second, then off. Frustrated, I simply kept turning the video output of my laptop on and off, and just from cycling it on and off, I got the backlight tubes to kick to life!!! I moved it to my desktop and got rid of my 19 inch crt, so I had room for this 19 inch lcd :P Later I noticed a bit of water in the screen so I shut it off, however when I went to use it later, the image would only flash on for a split second, then off again, then back on, and so on. I dissembled it today and can't find a single cap on the board that's blown (visually), and the only discoloration of the pcb is on the bottom, beneath a transformer, so I figure it's probably an okay amount of discoloration as a transformer will often make enough heat to do so. I plugged it in, and begun turning it on with only certain backlight tubes plugged in (theres 4 cables so I have to assume 4 tubes, one on each side of the screen, I also just found out you shouldn't let the unplugged leads too close to the socket on the PCB, it WILL ARC, the high voltage label etched into the pcb means business.) It would make some high pitched whining noises, the lcd would be doing it's flickering thing, sometimes the image would come up garbled, and then shortly after it started going garbled, it would kick on and stop making the high pitched noises, so I moved it back onto my desk still dissembled, and upon leaving the room long enough for the lcd to shut off, I came back to the same problem, and had to fiddle with it again to get it turned on (I'm using it right now :) What is it that makes these lcd's do this?, I know most problems with lcds are from the power inverter, and also when the backlights burn out (Hell only one could work for all I care, this thing is so bright it hurts the eyes). This is a 19" viewsonic lcd, and I did do some googling, one person noted for a similar model he tried replacing all 8 caps on the board (We have diff boards, but he said to replace all of them to be sure), he then said he was going to try replacing one of the mosfets, and that he would let us know how it went, still hasn't replied yet. I feel bad for posting this without pictures, but I don't have any good batteries around the house for my digital camera, I plan to get some pictures by the end of the day, but until then, perhaps you guys can tell me what it is you would like to see/need to see to help me figure this out. A free LCD guys, and it turns on to a usable state, so I KNOW it's worth fixing, sorry if I seem flabbergasted or something like I'm off my cradle, but an upgrade to LCD is awesome for me, I'm so used to using my crt's and I'm finding the crispness of the image very nice to look at.