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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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How to fix an LED backlight
I have a car stereo front panel (model: Panasonic CQ-DFX572N mp3 player)
in which the display suddenly stopped working the other day. I'm not much of an electronics buff, but on opening it carefully, I can see that there is a large plastic backlight (presumably an LED?) the size height and width of the whole front panel that sits behind an LCD 'mask' which then lets through the blue light to display the text, giving a blue text on black background effect. The blue backlight also liights up some front panel buttons and the area around the volume knob. The only front panel light the currently works is a red one, and therefore must have its own LED/backlight. I plugged the naked circuit board into the car stereo head unit and saw that the LCD screen still works, it's just the backlight that is broken. I can see what I'm sure are the the two solder points on the back of the PCB that correpsond to the backlight. They look OK, although by that I mean the solder points don't seem to be loose or dirty. So all that's broken is the backlight. Questions: Are these types of backlights just LEDS? Do they normally have fuses, is this what might have blown? Is this easily fixable, is there anything I can try given that a new front panel is almost the same cost as a completely new stereo? |
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