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Mac Forum / General / Portable Macs / June 2006Ti 500 LCD problem
I have a PB Ti 500 that the screen is very dark. The only way I can see what's even on it is to hold a flashlight right up against the screen. I have now replaced the motherboard, the inverter card and the LCD. I have a new PMU on the way as well. I know it isn't the backlight bulb or the problem would have went away when I changed the LCD. Essentially, I have rebuilt the entire laptop. If the PMU board doesn't fix it what could possibly be the problem??? > I have a PB Ti 500 that the screen is very dark. The only way I can see > what's even on it is to hold a flashlight right up against the screen. [quoted text clipped - 3 lines] > Essentially, I have rebuilt the entire laptop. If the PMU board doesn't > fix it what could possibly be the problem??? Does the inverter card recieve the DC input voltage that it should? That is the first place I would look since it is basically in the middle. If it does, then check its output. It should be a few hundred volts. If that voltage is there, then there is something amiss between the card and the CCFL (cableing or connectors). If the voltage is present at the CCFL then the CCFL itself is bad. In otherwords, you are going to need a voltmeter and/or o'scope and do some signal checking. Otherwise you will have to continue to guess. |
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