SOURCE: My JL audio 1000/1 amp does not work
Best bet is to send it back to JL, they do not sell the PCB with all of the components loaded on it. Most likely the transistors in the power supply have fried. Open it up and see if you can find any physical damage. Google the part numbers of the bad parts, and you should be able to fix it relatively easily. www.digikey.com is a great place for parts. Read this for more testing procedure: http://www.bcae1.com/ampfail.htm The whole site is wonderful, really.
SOURCE: JL Audio 1000/1 power LED is On But no Sound
my amp did same shit, its the rca cabbles, check them out at the back of the head unit. the input jack is probably bad on the head unit
SOURCE: 250/1 powers on but no output
If the amp is not going into protect, the power supply FETs have probably failed. In the corner of the amp near the toriodal transformer, there are 4 FETs against the heatsink. When these fail, the 47 ohm resistors at the base of the transistors often fail. If the resistors are dark, it generally means the FETs have failed. If you disconnect the amp from power and measure the resistance from leg 1 to leg 2 of the power supply FETs, a reading of near 0 ohms indicates the FETs have failed.
SOURCE: JL Audio 500/1 Amp, The green power light is on but no sound!
Check to be sure you are on the correct outputs on the head unit, and be sure the outputs do not have a separate volume control.
SOURCE: jl audio amp 1000/1 fix
IVE HAD 2 JL 1000/1S DO THIS TO ME EACH TIME ITS TURNED OUT TO BE A SHORT IN THE RCA IMPUT BUT ALSO CHECK YOUR RCA CABLES AND THE SUB INPUT ON YOUR HEADUNIT
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