Well, after all the learning I've done here I rarely get stumped on troubleshooting any more but this one has me guessing. Picked up the TV for $10 a couple days ago with problem unknown. Was told it wouldn't turn on. I got it up on the bench last night and plugged it in to check it out.
When the power is connected, there are no clicks or noise whatsoever. I'm not sure if the P board in this model is supposed to engage or not upon connection but most Panasonic sets I've dealt with do so I'm suspicious of the supply. However, it does have 5V present on the standby pin so I'm not real sure. Pressing the power button has no effect on it at all so that makes me wonder about the A board.
Other things to note. Per the attached picture, the pins labeled Main-SW1 and Main-SW2 have 5V on them even when disconnected from the A board. And STBY5V-ON never goes high, nor do the relays engage when I force that pin high.
My question is, am I going about forcing the P board on the right way or am I missing something? The P board is only around $40-$50 but I don't want to throw boards at this thing for no reason.
Thanks in advance for any assistance!
Aaron
When the power is connected, there are no clicks or noise whatsoever. I'm not sure if the P board in this model is supposed to engage or not upon connection but most Panasonic sets I've dealt with do so I'm suspicious of the supply. However, it does have 5V present on the standby pin so I'm not real sure. Pressing the power button has no effect on it at all so that makes me wonder about the A board.
Other things to note. Per the attached picture, the pins labeled Main-SW1 and Main-SW2 have 5V on them even when disconnected from the A board. And STBY5V-ON never goes high, nor do the relays engage when I force that pin high.
My question is, am I going about forcing the P board on the right way or am I missing something? The P board is only around $40-$50 but I don't want to throw boards at this thing for no reason.
Thanks in advance for any assistance!
Aaron
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