Television sony 34" xbr800 2003(?) picture tube television. when turning on i can hear it attempting to power up, but then no screen and no visual. red "standby" light lets me know it is not a power problem.

Sony eSupport KF 60XBR800 Support This may help

The problem based on the model number is in or around the red picture tube---the bright red screen causes the set to draw too much current and the shutdown circuit detects this and turns set off--self protection.

Each picture tube (3) has a IC chip on the board connected to it--shorted chip or bad picture tube.

Shop repair in most cases.

Hi,
It seems problem with low screen voltage to three picture tubes in this rear projection tv.
If standby light blinks 5 times after three seconds long pause then adjust screen volts of each picture tube to solve this issue.
Screen volt adjustment requires expertise and job of professional so please call local tv repairman to help you.
Thanks.

That is either the tube or a short circuit video driver semiconductor.
If it is intermittant, I would go for tube and prepair to purchase a replacement TV.
Sorry

Three possibilities
First it sounds like your Tube EHT ( Extra High Tension) power supply is failing.
CRT TVs need a high voltage around 30K for the tube to work. Whcih is generated in the set, if you hear clicking sound like arcking this will confirm it. Unless you are familiar with HV electronics you should not attempt to fix it since it can be dangerous.
Second possibility is the picture tube is failing.
Third possibility is there is some problem with the video circuits, to check this try connecting a VCR or a DVD to see if the picture is OK. If it is, the problem is in the video circuits.

your tv needs to be degaused or demagnetised.it cant be a bad picture tube unless it was dropped.
you can call a local shop to degause it in your home.rather easy and inexpensive to fix.

There is only a few reasons for this problem and it is a bad video IC on RED CRT board or Defective RED TUBE disconnect CRT board at end of neck on red tube Look at IC on That board while disconnected from tube turn TV on if it keeps playing without shutting off Tube is defective.

Can be 1 of 2 things. 1st the red tube just needs the voltage to it turned down. In the front of TV (you have to remove the lower front half of TV to access it) is a plastic square with 6 knobs. The from left to right top knobs control focus for blue,green red. The bottom knobs control voltage to each tube in same order (so lower right knob for red) turn SLOWLY to left to reduce voltage until excessive red and lines go away. If you over turn left or right set will turn off. If that does not fix it or if lines reappear then option 2 is that red picture tube is failing outright and needs replacement.

Lots of trouble with bad picture tubes on that model! Remove the front grill and very gently tap on the neck of the center picture tube near the socket with the back of your screw driver. If the picture flashes back to normal that means the the tube has an internal short. You may hear a snapping noise while tapping and the set may shut off. If the tube is not sensetive to tapping it it possible you have some other type of failure.

uplug and open the cover and look for the red cable coming out of the picture tube. follow this red cable to a small board where you should see 2 black screws labled focus and screen. try turning these a notch and power on. it worked for some people but not for me...:(