Hitachi tv keeps turning off itself related problems. Ask your Hitachi tv keeps turning off itself questions. Get free help, advice & support from top Hitachi experts. Disabled that feature and haven't had the TV magically turn on since. Like it might cause the TV to turn on by itself are set to the off position.
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post #1 of 3Old09-29-2013, 10:36 AM - Thread Starter
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I just picked up a Hitachi P50S602. When I hit the power button, it powers on (red power indicator light turns blue), displays static/snow for a few seconds and then turns itself off. When it turns off the blue power indicator light blinks five times and repeats. The insides look good, i.e. fuses, capacitors, resistors, etc.
Vs & Va voltages on the PSU and XSUS boards seem right. Removing either or both Y-Buffers just stops the brief display of static then TV still powers off. Removing the power cable from XSUS to YSUS will not make it stay powered on.
It seems like a power supply problem, but the voltages go up to their proper values before the TV powers itself off. However, if the PSU can't sustain those voltages, perhaps, that is the cause of the powering off, idk.
I haven't been able to find other similar problems, yet, on the web. Thanks in advance to any who happen to consider this issue.
Vs & Va voltages on the PSU and XSUS boards seem right. Removing either or both Y-Buffers just stops the brief display of static then TV still powers off. Removing the power cable from XSUS to YSUS will not make it stay powered on.
It seems like a power supply problem, but the voltages go up to their proper values before the TV powers itself off. However, if the PSU can't sustain those voltages, perhaps, that is the cause of the powering off, idk.
I haven't been able to find other similar problems, yet, on the web. Thanks in advance to any who happen to consider this issue.
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Could also be one any of the boards connected to power supply causing a PSU shut down
easiest way is disconnect/reconnect boards turn on set until you find the offending board that shuts down the TV. looks like you have looked into that in part.
You may have a power supply board fault a common easily repairable failure is the electrolytic capacitors
You May be able to replace the board or repair the one you have. google and look at ebey for
'Your TV brand /model # power supply
'Shopjimmy.com sells used ,new salvage and reconditioned boards
Google Your 'set name /model number' and capacitor kit
for more info also.
Operation or power supply failure *may include other parts or boards in addition to capacitors .
I fixed one of my sets a Dynex for $4.00 worth of capacitors . Old capacitors had bulging tops soldered in some new ones on the power supply board ,works like new
mfr support site may have a parts store or referral . MFr might be quite a bit more than the other sources like ebay or shopjimmy.com. some times you can even find new boards on Ebay .
All you need are screwdriver and maybe a nut driver to replace boards .
If you google the part number on the power supply circuit board or the TV brand model + power supply board you will likley find plenty of info best to order the board by the part number on the board itself .
The power supply board is the one where the wall cord is attached.
If you decide to replace the board order by the actual number on the board itself they can vary within a sets model run
See this thread for more details
https://www.avsforum.com/t/1491809/most-common-lcd-led-plasma-tv-repair
Don't forget a thumbs up if this has been helpful for you!
easiest way is disconnect/reconnect boards turn on set until you find the offending board that shuts down the TV. looks like you have looked into that in part.
You may have a power supply board fault a common easily repairable failure is the electrolytic capacitors
You May be able to replace the board or repair the one you have. google and look at ebey for
'Your TV brand /model # power supply
'Shopjimmy.com sells used ,new salvage and reconditioned boards
Google Your 'set name /model number' and capacitor kit
for more info also.
Operation or power supply failure *may include other parts or boards in addition to capacitors .
I fixed one of my sets a Dynex for $4.00 worth of capacitors . Old capacitors had bulging tops soldered in some new ones on the power supply board ,works like new
mfr support site may have a parts store or referral . MFr might be quite a bit more than the other sources like ebay or shopjimmy.com. some times you can even find new boards on Ebay .
All you need are screwdriver and maybe a nut driver to replace boards .
If you google the part number on the power supply circuit board or the TV brand model + power supply board you will likley find plenty of info best to order the board by the part number on the board itself .
The power supply board is the one where the wall cord is attached.
If you decide to replace the board order by the actual number on the board itself they can vary within a sets model run
See this thread for more details
https://www.avsforum.com/t/1491809/most-common-lcd-led-plasma-tv-repair
Don't forget a thumbs up if this has been helpful for you!
post #3 of 3Old10-01-2013, 12:39 PM - Thread Starter
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Thanks, but I still can't isolate the failure. These TVs are apparently very difficult to troubleshoot. I'm beginning to think it's a lost cause which is very frustrating since the screen turns on for a few seconds. Nobody on the internet seems to know how to troubleshoot Hitachis
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Q: Last night, as I waited for the sweet sound of construction to whisk me to sleep, my living room TV turned on by itself in the next room. After checking under beds and in closets, I’ve determined it wasn’t a bored intruder with an itch to watch Conan O’Brien. So what gives? Why did my TV turn on by itself?
But we did ask around inside the most reliable resource we know. Yep, that’s right; we’ve carefully mined the endless riches of crowd-sourced question forums like Yahoo! Answers and Answers.com for a stockpile of possibilities.
Sure, these sites are full of uninformed advice and laugh-worthy trolling. But when the best answer you can come up with is “Ghosts,” any advice is worth a look.
Here are just a few of the (more realistic) possibilities that your fellow anonymous internet contributors have suggested:
- You or someone else has accidentally set a “wake-up” timer for your TV.
- Your remote batteries are low. Remotes are known to send off some weird signals when they’re on the last bit of juice. Your TV could be interpreting infrared noise from your remote as an “On” command.
- The power button on the remote or the TV itself could be stuck.
- Somebody could be playing a prank on you.
- Your neighbors could be accidentally powering on your TV through the window, especially if they have the same model synced up with a similar universal remote (like the one your cable company gives you).
- Your pet might have just sat or stepped on your remote control while you were in the other room.
- Perhaps it wasn’t powered off entirely before (maybe you shut off the cable box but not the TV screen?), and it’s now flickering back on from a power surge.
- A fluorescent lamp inside the same room as the TV is blinking red and causing a sensitive infrared remote sensor to turn the set on and off.
- It could just be an internal electrical malfunction, like a resistor that’s changed value or a defective infrared sensor.
It sounds like this happened to you only once, so we’re going to lean towards the cause being a neighbor or pet accidentally sending signals to your TV to turn on.
But if it happens again, get started on some trial-and-error troubleshooting by pulling the batteries from the remote or placing thick tape over the remote sensor on the TV.
Oh, we do know one thing: If it happens at the same time every day, you definitely have a “wake-up” timer set. That, or it’s ghosts. For sure.
Got a good question you’d like answered? Send your queries and we’ll see if the Unplggd team or our readers can help answer it.
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