Question about Toshiba 42H81 42" Rear Projection Television

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Power keeps going off. is this a power surge protection device o

Or problem with the set. No visible electrical problems at the time of powering off.

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Power light comes on continues blinking but will not come on

Posted on May 03, 2010

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Posted on Jan 02, 2017

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AFTER FEW POWER OUTAGES, FREEZER TEMPERATURE KEEPS BOUNSING BETWEEN 5 AND 20 DEGREES, REFRIGIRATOR SEEMS TO WORKING FINE AND KEEPS TEMPERATURE.


Check the cabinet temperature with an independent thermometer. If it is does keep a stable temperature the problem would probably be electronic.

A power outage is often accompanied by a voltage surge. Sensitive electronics and computers can be damaged by a voltage surge. People are used to protecting personal computers with surge protectors but fail to realise these days almost everything is a computer or contains a computer. Radios and tv sets are computers and so are cars and even the humble toaster these days has some computing power.
Today almost everything but the cheapest of appliances should be protected. A minimum surge protection can be obtained by using an area surge protector.

Aug 18, 2016 | Liebherr Refrigerators

1 Answer

My sony shake 55 keeps saying protect eos when powered on, why?


Hi the link below is Sony esupport and you should find your answer there,
. The 1st solution I copy and pasted here..
  1. If there has been an electrical surge or power outage, then the internal surge protection inside the home audio device may have been triggered to protect the device from the surge. This is normal. To reset the internal surge protection circuit unplug the AC power cord from the wall for at least 30 minutes.
Here's the link for more solutions....
https://us.en.kb.sony.com/app/answers/detail/a_id/39211/c/65,66/p/41901,41902,91663/

Mar 20, 2016 | Sony Cameras

2 Answers

Today my power went out for a split second and came back on I turn my TV back on it makes a high pitched whining noise and the screen wont turn on. Cant add picture but model number is MW30G71.


unplug your tv. let it sit for a good bit. 1/2 hour did your power just go out or did you have a power surge then no power. surges cause the grid to go down for a second too and that causes problems too. surge protectors are good for everything. also are you on cable? if so have the cable company check they're filters into the house may be an issue but check the tv after a half hour unplgged and then plug in and turn on normally? sometimes it needs a reset time period before the fuses inside will reset themselves.

Nov 17, 2015 | Televison & Video

2 Answers

What's the difference between a surge and a spike in voltage?


A spike is an increase in voltage for 1-2 nanoseconds.
A surge is the increase lasts 3+ nanoseconds.

Feb 05, 2014 | Electronics - Others

1 Answer

Power light off


Power surges are damaging spikes of voltage in an electrical systems, caused by lightning strikes, changes or problems with the electrical grid, or large appliances.

Power surges damage or destroy computer hardware by overheating circuit boards and other components.

Surge protectors and other devices are used to protect computers and other electrical devices from power surges.

If damage occurs to a computer from a power surge, a process of trial and error is used to replace the damaged components.


Replace the surge protector or power strip.
If neither was attached to the computer, it is highly recommended that one be used.

Follow the user's manual to open the computer.
The computer manual may have shipped with the computer in book or CD form or may be found online.

Examine the system and make note of any visibly damaged components.
Damaged components may show visible burn damage or no damage at all.


Follow the user manual to remove the power supply.
You will need to unplug the power connections to each device in the computer as well as the system board.

WARNING: Before you start troubleshooting remember that you are dealing with electricity that can KILL.
http://www.kitchentablecomputers.com/static.php - rules
Only work inside the computer case when the power has been switched off and disconnected. Never open the power source.

Some of the below steps recommend removing physical parts within the computer.
While in the computer it is highly recommend that you be aware of ESD and its potential hazards.


Removal is generally achieved by removing the holding screws and lifting the power supply out of the system.

Follow the user manual to install the new power supply.
Plug the power cables into the computer components and the system board.

Close the case.
Do not re-insert the screws.

Plug the power cable into the computer and attempt to power the computer on.

Replace the power cables to the monitor and computer.
Examine the monitor.

If the monitor does not power on, it will need to be replaced.
Determine if both the monitor and computer power on.

If the monitor powers on but the computer does not replace the system board.
If both power on but there is no video signal, replace the video card.

Boot the system into Windows.
Go to the "Control Panel" and double-click on the "System" icon.

Click on the "Hardware" tab.
Double-click the network card, sound card, and other peripherals that are listed in the hardware tab.

If you replaced the system board, ensure that the device drivers are in place for the peripherals. Replace any peripheral that is still non-functional.

Computer Repair Tutorial Help and Tips

http://www.thepcmanwebsite.com/computer_repair.shtml

Dec 08, 2013 | Dell Vostro 410 Desktop Computer

1 Answer

I can not turn it on. How can I fix a no power problem?


Test your PSU power supply unit or replace it if your power supply units fan is not working your PSU is faulty
http://pcsupport.about.com/od/toolsofthetrade/f/powersupplytest.htm
Testing and replacing the PC power supply
http://www.youtube.com/watch?v=hbNxhvm0czs
One bad lead can cause a computer to continue on a cycle of restarting or to shutdown or fail to detect ,boot up a computer hard drive
WARNING Before you start troubleshooting remember that you are dealing with electricity that can KILL.
http://www.kitchentablecomputers.com/static.php - rules
Only work inside the computer case when the power has been switched off and disconnected. Never open the power source.
Some of the below steps recommend removing physical parts within the computer.
While in the computer it is highly recommend that you be aware of ESD and its potential hazards

Power surges are damaging spikes of voltage in an electrical systems, caused by lightning strikes, changes or problems with the electrical grid, or large appliances.
Power surges damage or destroy computer hardware by overheating circuit boards and other components.
Surge protectors and other devices are used to protect computers and other electrical devices from power surges.
If damage occurs to a computer from a power surge, a process of trial and error is used to replace the damaged components.
Replace the surge protector or power strip.
If neither was attached to the computer, it is highly recommended that one be used.

Follow the user's manual to open the computer.
The computer manual may have shipped with the computer in book or CD form or may be found online.
Examine the system and make note of any visibly damaged components.
Damaged components may show visible burn damage or no damage at all.


Follow the user manual to remove the power supply.
You will need to unplug the power connections to each device in the computer as well as the system board.
Removal is generally achieved by removing the holding screws and lifting the power supply out of the system.


Follow the user manual to install the new power supply.
Plug the power cables into the computer components and the system board.


Close the case.
Do not re-insert the screws.
Plug the power cable into the computer and attempt to power the computer on.


Replace the power cables to the monitor and computer.
Examine the monitor.
If the monitor does not power on, it will need to be replaced.

Determine if both the monitor and computer power on.
If the monitor powers on but the computer does not replace the system board.
If both power on but there is no video signal, replace the video card.
Boot the system into Windows.
Go to the "Control Panel" and double-click on the "System" icon.

Click on the "Hardware" tab. Double-click the network card, sound card, and other peripherals that are listed in the hardware tab.
If you replaced the system board, ensure that the device drivers are in place for the peripherals. Replace any peripheral that is still non-functional.


Computer Repair Tutorial Help and Tips
http://www.thepcmanwebsite.com/computer_repair.shtml

Jul 01, 2013 | Lenovo IdeaCentre K320 3019 PC Desktop

1 Answer

Power supply malfunctioning


Most surge protection power boards will protect computer equipment from mains spikes and surges.
A better and more expensive solution is to use an uninterruptible power supply (UPS). These units provide surge and spike protection and also provide power in the event of mains power failure.
Make sure you select an UPS model that meet the power requirements of all your computer equipment that is connected to the UPS with a mains down time of say 1/2 hour to give you time to shut down your computer in an orderly manner.

Sep 09, 2012 | Dell OptiPlex 780 PC Desktop

2 Answers

After a lightning storm my bosch single 30" wall oven displayed an F03 err. I turned the power supply off at the breaker for one minute as directed by the oven's manual. This action did not...


Find out what the F03 error is for and then check out the appropriate area. If there was a strike of surge the most likely place to look for damage is the area where the electricity first enters into the device.

Sep 07, 2017 | Bosch HBL 5036 Electric Single Oven

1 Answer

Wont restart after power surge & verifying power supply restored


The control board may have been damaged by the power surge. You should install a surge protection device on the incoming power line, thereby protecting everything in the home from damage.

If you need help with this, go to the following website and fill out the form, be sure to include an email address

http://taeckertindustries.com/prod04.htm

Nov 17, 2009 | KitchenAid 24 in. KUDI02IR Built-in...

3 Answers

Problem with Marantz SR5500 Receiver


Sounds like you have an issue with your electrical circuit. Your receiver could be receiving spikes of current from the electrical wiring in your house.

Review your current electrical situation. Keep in mind that certain outlets are on the same circuit and that running multiple, high-wattage devices on the same circuit can cause issues with some of those devices. Especially when it comes to turning devices on and off.

Many devices take a sudden, rapid charge to power their circuitry the moment you turn the device on. Home audio and HVAC systems are particularly notorious for doing this. Other devices on the same circuit can sometimes suffer influxes of power flow and may either turn off or go into standby mode to protect themselves from the resulting surges.

I've lost audio systems that way... I lived in an apartment building that has wiring most likely dating back into the 40's. I once turned on a space heater on it's max 1500 watt setting and blew my Logitech Z-680 speakers. (The "BOOM" sound that emitted from my subwoofer was AMAZING. I had just blown an amp circuit. It literally exploded inside of the subwoofer. Took pics and everything.)

If you have the means to do so... You might consider re-wiring your electrical circuit. Take into consideration where you're going to run certain devices and wire the system accordingly.

In the meantime, you would want to be sure to buy a HIGH-QUALITY surge protector for the audio system. Spend a few bucks and get a GOOD one with a good warranty on it. Don't use those cheapy ones that we only really use to split the outlet. NOTHING under 1,000 joules.

My receiver sometimes locks itself like that, though. If we have a power outage or the unit is unplugged suddenly, it will keep itself in standby mode until you unplug it, press the power button a few times to discharge any current left in the capacitors and plug it back in normally. Only then will it turn on again.

Let me know what you come up with.

Cyryl

Nov 02, 2007 | Marantz SR5500 Receiver

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