Question about RCA HD50LPW175 50" HDTV
When we try to power up our 50'' RCA DLP TV the blue lights on the bottom right corner of the TV flash and then go off and the TV does not fire up.
I ordered and changed the bulb and TV will still not start up.
I checked the power supply by bringing up a 42'' RCA DLP TV from our basement and it works perfectly.
I am not sure what to do now.
Hi, This could be several things as the power goes everywhere. Long distance troubleshooting so hang in there. First try a cold reboot by unplugging and replugging after 30 minutes. If nothing check P1 on the light engine for the following voltages: pin 2 5vdc, pin 3 3.3vdc, pin 9 3.3vdc, pin 12 12vdc. If any of these are not good it is the formatter board. If all are good, does the color wheel spin at all. If this is OK then check J4 on the light engine, the ballast enable line should be 0 vdc in stby, .5 vdc at turn on, and 2.5 to 3.25 vdc in run. If good, is the light engine trying to fire the lamp? If not, inspect the J4 connector and the lamp power supply, If they look OK then the lamp ballast is probably bad. This will give you something to do for now, Good Luck!
Posted on Feb 15, 2009
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