Re: Troubleshooting a nonfunctional LCD backlight on a QMX
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Stan Q301 was indeed the culprit! I have a replacement coming that should resolve the issue. Appreciate the excellent suggestion and thanks all for making this list so useful.
73 KD2WQI
If shorting pins 15 and 16 turns on the backlight, then check Q301.? Either it has a problem, or its connection to the pin on JP303 is not good, so the signal from the processor can't turn it on.
Stan KC7XE
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