Static when backlight turns off on Monster icarplay

hey, about two days ago my 30 g ipod started to become have a lot of static when i played it in my truck with my monster icarplay.i have the volume on the ipod set to about 80% and it is on a good frequency. the music sounds fine when the backlight of the ipod is on, but as soon as the light turns of the music becomes staticy. i've restarted the ipod several times and nothing has worked except to keep the backlight on all of the time when i am driving. Please help.

Don't be in too big a hurry to pick on the PMU. It could be a problem with impedance in the power circuit either inside the Powerbook or outside, like SuperSizeIt found with his surge suppressor. If your power line voltage is /i always /i at least the minimum specified on the AC adaptor, then check the following: are the contacts on the power cord clean? If not, polish them with a pencil eraser. Does the problem occur on every outlet, or just some? (Sometimes old outlets get corroded, especially in buildings with humidity problems.)
If AC power is not the problem, then remove the battery and inspect the contacts on the battery and inside the Powerbook. If there is a film or other contamination on them, gently remove it with a white pencil eraser. If there is significant corrosion on the battery, it's time to get a new one. A weak battery can also cause the problem.
Explanation: during high current operations such as reading an optical disk, excess resistance in the power circuit may cause the internal 12 volt supply to drop out of regulation faster than the battery controller can pick up the load. The inverter output voltage will then go below the level the backlight (fluorescent tube) needs to stay on. It then requires an inverter restart (extra high-voltage pulse) to reignite the backlight tube. The fast way to get an inverter restart would be to press the power key, then after the beep, press "s" to put the computer to sleep. Wake it up, and the display should relight.
Paul_B

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