Diagnosing Black Screen LCD - Working iMac
I would like to diagnose the iMac 2011 which I got from a friend.
The iMac seems to be working as I hear the chime at startup. The display appear to be black. I did the following:
- Checked display in a dark room : - nothing
- Shine a light to the display :- no picture
- Checked inverter of the LCD with voltmeter ": work fine
Now from here there are different possibilities as follows:
- Broken LVDS connector at the logic board
- Broken LED strip inside LCD
- Bad LVDS connector cable
- God know what exactly
So I want to begin with LVDS connector at the logic board. Where can I find the schematic of output pins and corresponding volts LVDS sends out to LVDS cable? Can this be checked with volt meter when iMac is on?
Questa è una buona domanda?