Re: Viewsonic VT2430 fluctuating 5V rail
It did disable the audio, I couldn't hear anything but had my meter on the 5V rail and saw it was pulsing. R_J do you think I should test a load on the 12v rail without the main board attached to see if it has any effect on the 5V rail?
When I did the load test on the 5V rail it wasn't fluctuating, but maybe it still comes from the power supply when there is a load on the 12V rail. What do you think?
Or could it be one of the caps on the main board? I am tempted in trying to change them (there are quite a few) but there are some 16V caps, 35V caps and 50V caps on the main board. Some are 1uf 50V, wonder if that could be a source? I checked all of them with the transistor tester ESR function, but a lot of them are in parallell so I don't really get good readings.
It did disable the audio, I couldn't hear anything but had my meter on the 5V rail and saw it was pulsing. R_J do you think I should test a load on the 12v rail without the main board attached to see if it has any effect on the 5V rail?
When I did the load test on the 5V rail it wasn't fluctuating, but maybe it still comes from the power supply when there is a load on the 12V rail. What do you think?
Or could it be one of the caps on the main board? I am tempted in trying to change them (there are quite a few) but there are some 16V caps, 35V caps and 50V caps on the main board. Some are 1uf 50V, wonder if that could be a source? I checked all of them with the transistor tester ESR function, but a lot of them are in parallell so I don't really get good readings.
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