Got the 10 blink LED after pressing power on TH42PZ700U. Gonna copy over my posts from another website, since no one has answered it or replied there.
So, I ended up opening the tv last week and trying the 10 blinking light flowchart to find the defective board(s) from the very end of this manual. link below
www dot scribd dot com/doc/68238934/25/Reset-Procedure <-cant post urls
For LED blinks 10 times after pressing the power button (TH42PZ700U)
step 1 I believe was "yes"
when I plugged in the power the tv would click on, the SC LED SS LED would turn on, but then slowly dim to off after about 20/30 secs.
If I remember correctly, I think the LED was solid, for a few seconds, then it would start blinking, I think I was a little confused at the time, and wasn't sure if this was yes or no. I did end up ordering a $10 PB board just in case, still waiting for this to arrive. (update below, I remembered this incorrectly)
I burrowed a multi meter from work, a Velleman DVM850BL Digital Multimeter. Here is an image of it.
www dot moneymachines dot com/multimeter.jpg
I couldn't find much info online for testing circuit boards, everything I read said that the board schematics should say where to ground the meter. I tried a bunch of different configurations, and I think I was able to read some volts with the positive red line was plugged into the 10ADC port and dial set to 20m on the right side. when testing TP3504 on the H board the meter flashed a bunch of different numbers very fast and it hit a max of 6+ volts for a like a milli second. I am not sure if the voltage is supposed to be under 5 volts or if I was even doing it right. All the other ways I tried the meter, it wouldn't read anything and was just around 0 or .1 or something. I was just grounding it on a metal part/frame of the tv. Anyways, I assumed this was yes and moved on.
Step4 (last page)
Set the meter the same as in step 3 and got a super quick reading of around max 11+ volts. So I guess "yes".
read a max of 6+ volt again, so again "yes". I ordered a $99 DH board, that has a warranty and free return if I don't need it.
Just thought I would share in case anyways has any other ideas, or to tell me I did it wrong. I will keep this updated after I try those 2 boards once they arrive.
ok, well I guess I will update.
Got my 2 parts/boards in the mail yesterday. PB board(fan control) and DG board(tuner and HDMI inputs). Anyways, neither of them fixed the issue Still got the 10 blinking lights.
update for step 2 from the previous post, I re did this step and it made no change to the tv, the power LED does not come on at all, until I press the power button then it blinks 10 times as usual. I have never seen the fans come on since getting the 10 blinks. Same result with old and new board.
However I did figure out the multi meter. I guess I was doing it wrong before.
using this meter
www dot moneymachines dot com/multimeter.jpg
replace the "dot" with "."
I put the positive red line in the VmA input on the right and set the dial to 20m on the left side. and grounded it on a metal part of the tv. I was then reading 5 volts for a few seconds on the noted locations in step3. and around 9 volts at the noted location in step 4 of the link.
However these steps are sort of worded vaguely.
"Unplug the TV and connect PB30. Disconnect H2 on the H board. Place your meter on TP3504 (*2)(SUB5V)on the H board(See fig.1). Plug in the TV and turn it on. Is there 5V present?"
"(*2) Expect this voltage to be present for a couple of seconds only."
When following the steps, disconnecting inputs on certain boards, and plugging in the tv, I would meter the 5v for a few seconds, but "turning on the tv" (pressing the power button) didnt seem to have any affect on the voltage. The voltage would just always disappear after a few seconds no matter if I pressed the power button or not, the 5v would appear a couple seconds after plugging the tv in, and then always fade off a few seconds later. so not sure if this step is "yes" or "no".
However, if I kept all the boards intact and all inputs connected, and meter the locations the 5v and 9v would stay constant, but if i pressed the power button, the voltage would slowly die. I think this was the case for both voltage locations, I know it did it with at least one. Anyways, I ordered a $30 H board, because that seems like the only other solution I could think of, according to this manual.
www dot scribd dot com/doc/68238934/25/Reset-Procedure
Any other suggestions/ideas?
I'll update after trying the H board.