I have the same problem with my unit. The on button momentarily turns green and then to red. I have checked the fuse and it is still in tack. Kelvin mentioned a "X Volt Regulator" as a possible source of the problem. I am trying to fix the TV myself and cannot find that part. What is the proper name and or part number.
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Re: X volt regulator
1) Unplug wire harnesses = pull chassis ( requires 2 chassis bolt
2) Dis-mount Convergence / power supply board = the one with
3) Locate 5 volt regulators mounted to heatsink
4) Remove old solder from pins of all four regulators =
Re-solder + solder any / all bad conncts on board....
5) Replace bad 4 amp fuse hidden in power supply area...
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If you have a voltage meter there are some things you can check. Unplug the unit and remove the back cover of the set. Then Plug the unit back in. You will need to tape down the lamp safety switch in order to do these tests. Here are all the failures that would give you a lamp error and what to check. Cause 1. Unit powers on and works properly for a while then shuts off with a red lamp led(lamp error). Suspect bad lamp and replace. Cause 2. Unit does not power up correctly and you have red lamp led(lamp error). Check the lamp enable line at connector J14 on the back of the light engine. If pin 6 does not switch to 5 volts after turn on, but your 12 and 5 volt supplies are good, then suspect a defective light engine. Cuse 3. At power on the lamp turns on and off 3 times and then the unit shuts down with a red lamp led(lamp error). You have a defective light engine. Cause 4. Unit does not turn on correctly and you have a red lamp led(lamp error). Check for 12 volts at connector J9 pin 4 on the light engine. If voltage is missing check for an open fuse F9A09 on the power supply board. If it is open, then you need to replace the fuse and you still have a defective light engine. Cause 5. Lamp enable line at connector J14 pin 6 on the light engine does go to 5 volts at turn on, but does not drop back to 0 volts after 5 seconds, but your 12 and 5 volts supplies are good then you have a defective light engine. Cuase 6. Check for 5 volts at connector J9 pins 1 and 2 on the light engine. If low or missing check Capacitors C9A37 and C9A38. Values are 3300MF/10V. Replace capacitors if defective.
U just may of blown fuses on the power supply of the television if you are sure it was a surge. If u can open the unit check all fuses on the power supply for open coniditions. If the future is a good Ideal to use a surge proctector as this will protect your equipment. Make sure power is off and remove AC power to check fuses. Sometimes just removing AC power for a least 2mins will reset the unit.
ok , on hitachi pro tv is very common with bad power supply u may want to replace the voltage regulator which is next to the fuse u already replace , also loose connection on all the power supply seccion , also u may want to check the resistor close by the convergence ic 2.2 ohn if this are smoke replace stk392-110
The TV is in shutdown. The red LED is the shutdown indicator. Check fuse E994. If its open, the TV will need the deflection P.C.B. replaced. Its probably not worth the repair costs. These sets also have had problems with the voltage regulator circuit, requiring replacement of the regulator IC at a more reasonable cost.
RED light is protect circuit = do not disable !
Look for C702 near flyback transformer - might be hidden in
glue = check it = if shorted, replace 102K / 2KV with 3KV =
Sony part # 1-161-754-00 and replace E994 pico fuse.....T.
1)pull chassis.remove power PCB==the one with
large heatsink w/convergence IC's on it
2)Observe four regulators also on same heatsink
Remove solder from all reg. pins-clean PCB
4)solder any/all bad connects
5)replace 4 amp fuse
6)reassemble & test
1. Unit powers on and works properly for a while then shuts off with a red lamp LED (lamp error). Suspect bad lamp part # 915P020010 2. Lamp enable line at J14 pin 6 does not switch to 5 volts after turn on, 12 and 5 volt supplies are good. Suspect the Light Engine part # 939P977010 3. At power on the lamp turns on and off three times and then the unit shuts down with a red lamp LED (lamp error). Replace the Light Engine part # 939P977010 4. Check for 12-volts DC at J-9 connector pin 4 on the Engine Driver PCB, if missing check for an open F9A09 on the Power PCB, if it is open replace F9A09 part # 283P127060 and the Light Engine part # 939P977010 5. Lamp enable line at connector J14 pin 6 on the Engine Driver PCB switches to 5 volts after turn on but does not go back to 0-volts (low) after 5 seconds, 12 and 5 volt supplies are good. Suspect the Light Engine part # 939P977010 6. Check for 5-volts DC at J-9 connector pin 1 and 2 on the Engine Driver PCB if low or missing check C9A37 and C9A38 both 3300 UFD 10 V part # 181P732040 on the Power PCB part # 930B929001
Had the exact problem on 11/14/06. Ordered a power supply board, which was $300+, got it in and when I went to replace the part, found that the old part had a blown fuse (a lot cheaper). Of course if I had put in the new part it would have fixed it also. CHECK THE FUSES IN THE MIDDLE CIRCUIT BOARD (there are 3 boards).
If you're NOT still under warranty you should at least open the TV and look for a blown fuse near where the power cable enters the set. A lot of times you can buy replacement fuses at a local electronic or hardware store and they're easy to replace.
Check the fuse. If it is blown, it will be obvious and make sure that the set is unplugged before replacing it. If it blows again, or if it is not blown, your problem is probably in the 'X' volt regulator and you will need professional help with the repairs.
You can also check the board where the components are mounted and resoled any that look bad. Brief power outages may cause the TV to turn off on its own. If you are using a surge protector, try connecting the set directly to the wall outlet.
In your case it could caused by a blown fuse, a leaky diodes or a bad solder joint at the horizontal drive transformer.
All can be replaced at a local electronic or hardware store and they're easy to replace
If this does not correct the problem, you may need to have your TV serviced.