I have changed the logic board as the lcd connector was damaged. I have put all the parts back and only two led lights are on and the screen is black. When I connect the external monitor third diagnostic led goes on but there is no image on the external monitor. I. cannot figure out what is wrong. Anybody had similar issues?
Thanks a mil for help
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With the internal display connected and powered take a bright flashlight held against the screen at a sharp angle are you able to see the faint image of your desktop and it’s icons? Make sure you don’t mar the screen!
If not then you likely have either a bad connection or a bad GPU board.
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The onboard diagnostic LED's only really relate to the internal display. You'll need to connect the internal display directly.
crwdns2934271:0crwdnd2934271:0 Dan crwdne2934271:0
with the internal display connected I only get two led lights on and strangely so, if I connect the external at the same time it lights up the 3rd light.
crwdns2934271:0crwdnd2934271:0 Lukasz Gudaniec crwdne2934271:0
Time to inspect the LVDS and power cables from the logic board to the display assembly. Make sure they are not bent or damaged in any way.
crwdns2934271:0crwdnd2934271:0 Dan crwdne2934271:0