Pismoscreen remains dark after start - please help

Question

My pismo screen remains dark after starting the computer, I just controlled the electrical connections as previous described in the forum but with no results.
Starting by cd has no effects - the screen remains dark, but the computer is visible as volume in the network .
As my powerbook has the same default after an expensive repair by apple 1 year ago (they did´nt even tell me what was going wrong) , I would like to know what could be the reason of the malfunction and if there is a possibility to fix the problem by myself.
regards
zacambo

Answer 1

Cacker,
I would certainly give the microprocessor card a shot as described in an earlier reply.
When the 'book is running, can you move the display from almost closed to fully opened (almost 180º) and cause the backlight to light up? If so, you have a loose connection or damaged wires where they pass through the hinges/clutches.
You will want to lift off the keyboard and heat shield and check the inverter/backlight connections on the logic board.
Since you can see data, one inexpensive repair is replacing the inverter board ($10-15); this powers the fluorescent backlight and is very easy to replace. See this link for the inverter and cables.
http://www.ifixit.com/Guide/6.12.10.html
Note: You do NOT have to remove all the items as shown in this guide. To replace the inverter, remove all power > keyboard (don't disconnect - just lay it on the palm rest upside down) > heat shield > clutch cover.
Here is the full guide:
http://www.ifixit.com/Guide/6.0.0.html