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Re: jxp720 no sound, light going red to green to red
With your multimeter set to DC volts, the black meter lead on the ground terminal of the amp and the head unit on (so the amp will have remote voltage applied), touch the red lead alternately to the B+ and remote terminals of the amp. If the voltage is below ~11 volts, you need to check the wiring feeding whichever line is too low.
If the voltage remains near or above 12v, disconnect all speaker wires from the speaker terminals of the amp and disconnect signal cables from the amp. If it powers up, the wiring needs to be checked. If it still shuts down, the amp likely has blown output transistors.
The following page can help you troubleshoot the problem if you want to try to repair it yourself.
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If both yellow and green LEDs come on, this indicates a deeply discharged or defective battery pack. Allow the battery pack to remain in the charger for 15 to 30 minutes. When the battery pack reaches normal voltage range, the red LED should come on. If the red LED does not come on after 30 minutes, this may indicate a defective battery pack and should be replaced. n After normal usage, a minimum of 1 hour of charging time is required to fully recharge battery pack.
I don't know how to solve your problem but, the three lights mean this:
Red LED light indicates the battery is being charged
Green LED light indicates that the battery is fully charged
Amber LED light incidates that the battery power level is low - the battery needs recharge.
Do not recharge you battery over 24 hours.
check your wireing your CD player might be bad or your amp is in power safe mode someone might have turend down your sub. vol. on your amp check that and there should be a red or greed light on the back of it make sher its green
This could be as simple as a bad connection at the voltage regulator IC or blown output transistors. If you have a multimeter and some experience with electronics repair, this should be fairly straightforward.
Let me know and I'll try to walk you throught the repair.
The Protect light would normally be Red. You need to test your RCA's and make sure your getting a signal to your amp. I would just buy a new set or if you have another set just try them. If you get your amp to power on and all of your voltages are right with the proper signal and your amp fails to turn on you Have a bad amplifier