E
ElectronicEquipmentRepair
VIP Trade Partner
We recently had to repair a control unit that had the usual cracked control knob and failing display issues. Someone else had opened the unit before we worked on it and we found during testing that the LCD backlight was also not working.
We found the cause was a pair of burnt out resistors for the backlight LEDs and this appeared to be damage caused by a tool shorting out the backlight LEDs during the previous attempt to repair the unit, while the unit was powered on.
Replacing the burned resistors restored the function of the backlight LEDs. It is always interesting to see how things can go wrong with DIY repair attempts.
No lasting harm was done, but it certainly pushed up the time spent on what was otherwise a straightforward repair.
We found the cause was a pair of burnt out resistors for the backlight LEDs and this appeared to be damage caused by a tool shorting out the backlight LEDs during the previous attempt to repair the unit, while the unit was powered on.
Replacing the burned resistors restored the function of the backlight LEDs. It is always interesting to see how things can go wrong with DIY repair attempts.
No lasting harm was done, but it certainly pushed up the time spent on what was otherwise a straightforward repair.
