davisflow
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Oct 10, 2015, 11:07 PM
Post #21 of 49
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Re: [jts1957] LG 42cs570 shuts off after 10 seconds of powering on.
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(I was able to connect the pins with the connector unplugged, but not with the connector plugged in.) The below tests are with the connecter Unplugged.
Next make a jumper that you can connect from POWER-ON to any of the 3.5V pins. This is only for a test, you shouldn't let stay running more than a minute or so at a time. If you can verify that 12V and/or 20V are coming up while you do this, all the better. The red power light did not illuminate, however, 12V pin had 12V; and 20V pin had 18.5V.
If power supply/inverter passes this test, make a second jumper that you can connect from INV ON-OFF to any of the 3.5V pins. Again, even if back lights come up and stay lit, do not run for more than a minute. If they shut down monitor ERROR pin, to see if it follows on/off of the bulbs. One value when bulbs are lit versus a second value when bulbs are extinguished. When I plugged the set into the outlet, the back light comes on for about 1 second, during which time the error pin reads 0.02V, Then the back light shuts off and the error pin reads 3.5V. The red power light is not lit during this time. So the Power Supply / Inverter passed the tests then?
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