This series had a few issues that could be your problem. The first is bad electrolytic capacitors within the power supply and within the CCFL inverter. This was an industry wide issue as there was a flood of bad caps being sold. Often a good inspection will allow you to see leakage and often swollen.
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This series had a few issues that could be your problem. The first is bad electrolytic capacitors within the power supply and within the CCFL inverter. This was an industry wide issue as there was a flood of bad caps being sold. Often a good inspection will allow you to see leakage and often swollen. Here’s more on it [https://en.wikipedia.org/wiki/Capacitor_plague|Capacitor Plague]
The backlights used is a CCFL basically a small fluorescent light that sits on the sides of the LCD panel. Using a flashlight pressed against the screen at a sharp angle on your reassembled system. The systems display should offer a faint image if not the backlight power inverter and/or CCFL bulbs need replacement.
This series had a few issues that could be your problem. The first is bad electrolytic capacitors within the power supply and within the CCFL inverter. This was an industry wide issue as there was a flood of bad caps being sold. Often a good inspection will allow you to see leakage and often swollen.
The backlights used is a CCFL basically a small fluorescent light that sits on the sides of the LCD panel. Using a flashlight pressed against the screen at a sharp angle on your reassembled system. The systems display should offer a faint image if not the backlight power inverter and/or CCFL bulbs need replacement.
Here’s a useful guide [document|997|17” G4 iMac]