Hi makemoneygre,
This is an indication of out-of-regulation in the power
supply section. The very common caused of this fault is the leaky electrolytic
capacitor in that section. It will drop the supply from normal voltage and will
disable the unit. Sometimes it has a bulged/dome at the top but not all, it is
better that you have a capacitor checker/tester to determine its condition. Also, bad
solder joints can produce the same symptom, it is hard to spot, you should use
table lamp/portable lamp for finding the cold solder. Secondary reason of fault
is the open fuse/fusible resistor in series with the output of regulator IC/transistor, shorted/open
Regulator IC/transistor, shorted zener diode(all are in the power supply
section) and the microcontroller. Best that you check the output voltage of
each regulator to determine where the fault came from and narrow the job.
If you don't have necessary tools and test instruments, and
can't do the job yourself, I would advice you to look for a professional to
troubleshoot the problem. Don't attempt to work in the power supply if you
don't know the safety precaution of handling it, there some stored electricity
enough to hurt you with a little mistake only.
Hope I helped you.
Have a nice day!
Thanks for using Fixya.
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