Having problems with your Apple Computer Monitors ?

I have an apple cinema display 23 which is over 2 years old connected to a Power PC G4 tower with ATI video card. Last week it would not wake up from sleep. Little light gives 3 blinks, short long short. When I connected a second monitor, System profiler still sees the monitor. Keyboard and mouse would work through the usb ports when connected. I have replaced it with a Samsung P2070, but it would be nice to have this one fixed. I have taken it apart according to a description found on the web


Answers :

Drtech572, Did you see any solder joints that looked "Frosty" compared to what I call "mirror finish" ? All solder joints should have "mirror finish".Also examine all the "through hole mounted" components that are mounted (soldered) to the board for what is known as "thermal overstress fractures". You will need large magnifying glass or better still, a 10x-20x inspection microscope to do this. Examine the larger and more weighty components first and then move on to the smaller ones. You will be looking for a circular "hairline" thin crack around a components lead where it is soldered to the board. There are two causes for this. 1. Shipping & Handling. 2. Thermal shock--cold to hot to cold to hot etc. On some printed circuit boards you will see "globs" of hot-melt glue that might have been spilled onto the board. No! No! No! The glue was put there for cause #1. You should also inspect for any solid state devices (transistors, integrated circuits, rectifiers, opto couplers) that may have "cracked" bodies or leads that are not soldere properly. Also check the bottoms of electrolytic filter capacitors. sometimes they won't "DOME" the top of the aluminum "can" housing. They will "vent" from the bottom pushing the rubber seal plug out towards the board where they are mounted. I hope this has been of some help to you. please rate this response on fixya. I'm louie12fix on fixya or lmistyrel @aol Bye for now.
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