wanted to post a success story that might help someone now or in the future.
someone gave me a 23" cinema display HD (built 8/2007 according to serial number lookup)--the aluminum version, model A1082. it was dead (the owner, an older lady, said "the cleaning woman ran the sweeper over some power cords and everything blew up"). after some googling, i found the apple service manual for the display, which showed how to open the case. i removed the display from the case, and found the connector on the main board for the power-in from the power supply brick. It tested 24V which is correct. after a considerable amount of googling, i found the following thread http://www.ehmac.ca/mac-ipod-help-troubleshooting/75311-cinema-display-troubleshooting-parts-4.html which describes a fairly common problem with the voltage regulator on the main board. (see post 35). having nothing to lose, i ordered a replacement voltage regulator (the person writing the post recommended a beefier voltage regulator, and included in the post a reference to a supplier including part number). it arrived yesterday. as the poster said, the replacement was larger than the original, so i de-soldered the original from the board and then soldered 3 leads to the solder pads, and soldered the new voltage regulator to the leads. (the VR has 3 leads; apple cut the middle lead from the original VR and used the "tab" on the top of the VR as the middle lead--the middle lead and the tab are electrically connected inside the VR). i then used electrical tape to insulate the solder joints, and taped the VR to a spot on the back of the display where it would fit when put back into the case. put the display back into the case, buttoned it up, plugged it in, and voila--back to life--for $2 plus shipping!! ken -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/g3-5-list
