This is an indication of out-of-regulation in the power supply section. The very\015\012common caused of this fault is the dried-up/leaky electrolytic\015\012capacitor in that section. It\015\012will drop the supply from normal voltage and\015\012will disable the unit and blinking error appear. Sometimes it has a bulged/dome at the top but not all, it is better\015\012that you have a capacitor\015\012checker/tester to determine\015\012its condition. Also, bad\015\012solder joints can produce the\015\012same symptom, it is hard to spot, you should use table lamp/portable lamp for\015\012finding the cold solder. Secondary reason of fault is the open fuse/fusible resistor in series with the output of regulator IC/transistor, shorted/openRegulator IC/transistor,\015\012shorted zener diode(all\015\012are in the power supply section) and the microcontroller.\015\012Best that you check the output voltage of each regulator to determine where the\015\012fault came from and narrow the job.
If you don't have necessary tools\015\012and test instruments, and can't do the job yourself, I would advice you to\015\012look for a professional to troubleshoot the problem. Don't\015\012attempt to work in the power supply if you don't know the safety precaution of handling it, there some stored\015\012electricity enough to hurt you with a little mistake only.
Also check if your unit is under warranty /extended warranty,\015\012avail it because the manufacturer of your unit will fix it for free. Don't open\015\012the back panel, this will void the warranty.
Hope I helped you.
Have a nice day!
Thanks for using Fixya.
First check to see if the firmware update brings back to life, if not then the power supply will be the problem, maybe \015\012
Solution #2: Check fuse FE73 (F875 on XXHL167 Models) located on the Main Power Supply
PCB. Fuse FE73 (F875) protects the 12vdc supply that is used to source the 3.3vdc supply to the
\015\012Digital Seine PCB. Use Part Number 75005716
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