My CDVB2500E will not shift out of Standby mode. It has previously worked well, but now neither the remote nor the power button on front of the unit will switch it on. I have tried powering off using switch at back of unit - disconnecting from power supply and then re-connecting but nothing works. Is it dead - or can it be fixed?

Hi,

Please power cycle your tv and check that it's connected as it used to be when the video-button was working for you. You can also power cycle your sherwood device before attempting your initial procedure/button press again. If it still does not work, please test that your speakers are able to function with other items in your location in order to eliminate the speakers as the potential cause of the issue.

Thank you.

Try following the steps below.
Step 1
Press the power button once. If the TV does not turn on, observe the LED indicator, usually located on the TV's lower front panel. If the LED indicator turned off after you pressed the power button once, it is in standby mode. Press the power button once again to exit standby and turn on the TV.

Step 2
Observe the Standby light if the remote control will not work. If the Standby light stays on, the television is in Standby mode. Press the power button on the television, then try to use the remote.

Step 3
Turn the Energy Saving Switch off, then press the power button. The Energy Saving Switch is located on the rear or side panel on most Sony model TVs. Refer to your TV user manual for the exact location of the switch.

Instructions

1. • 1 Check the main power cord if the receiver fails to turn on. If it is unplugged or loose, securely plug it in to an electrical outlet. If this fails, try plugging the receiver in to another outlet. If the receiver starts, the previous outlet is damaged. Call an electrician to repair it. If this fails, try turning the receiver on with the remote. If this does not turn the receiver on, try turning it on with the power button on the receiver itself. If this works, change the remote's batteries.
     
   • 2 Leave the receiver in "Standby" mode if it immediately goes into "Standby" when you turn it on. With the receiver still in "Standby," unplug the main power cord. Wait for around 30 seconds, then plug the receiver back in.
     
   • 3 Check the audio cables if you experience sound issues. If they are loose or disconnected, securely reconnect them. If you still do not have any audio, press the "Input" left or "Input" right buttons on the front panel to select the appropriate input source. You can also set the receiver to automatically detect input signals and select the appropriate input source. To do this, access "Audio Select" from the main menu and select the "Auto" option.
     
   • 4 Try factory resetting the receiver if you experience persistent audio or video issues. Press the "Standby/On" button on the receiver's front panel. Press and hold the "Tone Control" button, then press "Standby/On" again. Select the "Preset" option, then choose "Reset." Press "Standby/On."
     

The remote control will not operate the TV when the TV is in the OFF mode (No LED lit on front bezel). To change the mode from OFF to STANDBY or ON, press the POWER button on the side of the TV. Once the POWER button is pressed, the LED will change to either red to indicate STANDBY or green to indicate ON, whichever mode the TV was in prior to being turned off with the TV POWER button.

By pressing the POWER button on the side of the TV, the mode will toggle from OFF to either STANDBY or ON. If the POWER button is pressed and then the LED on the bezel is red, the TV is in STANDBY mode and will need to be turned on using the remote control. If the POWER button is pressed and then the LED on the bezel is green, the TV is ON.

Did you try this....

In the event of a power outage, the RV-8 will display a BROWN
OUT!! PRESS STANDBY message. To turn the unit on, use the
STANDBY button. For more information, see “POWER
MANAGEMENT” on page 3-3....

POWER MANAGEMENT ON, OFF

"Setup" >> "Power Management"

Opens the POWER MANAGEMENT menu, which is used to automatically
put the RV-8 into standby mode during brownouts.
When set to ON, the RV-8 detects low voltage levels or a momentary
loss of power and puts the device in standby mode. In the event of a
power brown out, the RV-8 will display a BROWN OUT!! PRESS
STANDBY message. To turn the unit back on, use the front panel
STANDYBY button.

When set to OFF, the RV-8 will attempt to function during a
momentary power loss, however software settings may become
corrupt and need to be reset.
When the RV-8 is in standby mode, pressing the button turns the
unit on and activates all zones that were active in the previous
operating session.

The RV-8 does not power on.
1. Make sure the rear-panel power switch is set to the | (“on”)
position.
2. Attempt to power on the RV-8 with the front-panel Standby
button and remote control On button.
3. Examine the power cord to ensure a good connection between
the rear-panel AC input connector and the wall outlet.
4. Check the electrical circuit and breaker.

You Need a new Power Supply, part # LJ44-00025A
buy it here for $139 http://www.adc-ast.com/
I have my tv working like new.
If you want this time the power supply last, do not turn off, just press tv/video button to switch input source, let the tv in sleep mode.

Credit: User IMJR

Try pressing the small reset button on the back, it works, and you will not loose any stored information which caused the unit to go in the stand by mode.

or
Have you tried turning it off for an hour and then turning it back on. This happens to me quite often and leaving it off for a while ususally allows it to come back on. Also have you tried to press the TV/AV button on the remote as sometimes it switches to TV mode when its on standby and then standby won't work as its on TV mode and needs to go back on to AV mode. Basically just press the AV button on the digibox remote and then try standby.

or
if the batteries are removed and left for about 20 minutes before being replaced again, everything works as it should.
or
if any of the above suggestions does not work then you have to open the unit and on the main board of the tv there is a thin mini tube light like component called fuse you will have to replace that fuse .the fuse is very very cheap and you can easily get it at any electronics shop.and if still the unit does not work then there is a major fault in the power supply board and should be taken to the service center for diagnosing the fault that it is repairable or not.but i hope the above information provided will definately help you to solve your problem.

what the problem sounds like is that your power button on ur main deck is broken or its in a standby mode activated by the remote. like some new dvd players that have the click in power button on the front u can turn them off by remote saving having to turn on the whole unit again from the main to use it.