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Powered up my Cobra MR F45-D and LCD screen not showing up. Distress light is on and getting a small hissing sound from unit.

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6ya6ya
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Posted on Jan 02, 2017

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Bajanguru
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SOURCE: Front LCD screen on Motorla Raza v3m

do a master reset.......or reflash the firmware.

Posted on Dec 21, 2007

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budmrtn
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SOURCE: I powered up my pc,

It can be caps are leaking, or arcing in the the inverter circiuts or from the lamp assemlies, shorting out transistors.
If you are going to DIY and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply (they should be replaced in a set), blown fuses; poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed DELL monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.

Basic LCD monitor troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting

http://en.wikipedia.org/wiki/Capacitor_plague

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

Replacement board: http://www.lcdrepair.us

Posted on Oct 13, 2010

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