In need of some help - I've been trying to get an SSD drive swap done on my mid-2010 iMac 21.5", and have had the machine apart several times during my attempts to get the SSD to work. On what I thought was going to be my final try, I inadvertently forgot to reconnect the v-sync cable on the LCD controller board, and went to power it up, but the display remained dark. I realized my mistake and reconnected the v-sync cable, but subsequent attempts to power up the machine are met with the same result - it sounds like it is booting (i.e. Apple boot sound plays, I can hear fans spinning and such, etc), but the display remains dark. I removed the SSD and put the original HDD back in, was extremely careful reconnecting all of the cables, but no dice, the display still remains dark on boot. I did try shining a bright LED flashlight on the LCD, but I see nothing at all on the display, which makes me think that either the LCD is getting no power and/or no signal. First of all, would having the v-sync cable disconnected then powering the machine up somehow fry the LCD and/or the controller board? Next, I know that the ribbon signal cable head for the LCD is extremely fragile - even though I was very careful each time I reinserted the cable head into the connector on the mobo, is it possible that I somehow damaged it, which would cause the symptoms I'm seeing?
This is my first iMac, but I would think that the same rules apply as with a normal PC display - if the LCD was getting power, I would think you'd still get a backlight, but no images on the screen. Signal alone would not show anything on the screen without power. I'm leaning towards it needing a controller board replacement, but I wanted to check first to see if there may be something else that I'm missing here - perhaps I fried the LCD by not reconnecting the v-sync cable properly?
BTW, the machine worked fine up until this last attempt with the SSD - I'd had the display in and out of the unit several times prior to this, and each time it worked fine after the reinstall. It was just a bonehead move on my part to forget to reconnect that v-sync cable this last time. I was having some struggles getting it to recognize the SSD, hence the multiple attempts/disassembly (the SSD swap issues would be for another thread, though).
This is my first iMac, but I would think that the same rules apply as with a normal PC display - if the LCD was getting power, I would think you'd still get a backlight, but no images on the screen. Signal alone would not show anything on the screen without power. I'm leaning towards it needing a controller board replacement, but I wanted to check first to see if there may be something else that I'm missing here - perhaps I fried the LCD by not reconnecting the v-sync cable properly?
BTW, the machine worked fine up until this last attempt with the SSD - I'd had the display in and out of the unit several times prior to this, and each time it worked fine after the reinstall. It was just a bonehead move on my part to forget to reconnect that v-sync cable this last time. I was having some struggles getting it to recognize the SSD, hence the multiple attempts/disassembly (the SSD swap issues would be for another thread, though).
