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The problem is a blown capacitor and a pico fuse. You can get complete parts and instructiosn for this fix from TvRepairKits.com. They put together a kit for this. I used them for a convergence problem recently and they helped me fix my set.
Hi, this means you have a short somewhere in the power supplies, this type problem is very difficult to diagnose without removing the back cover and seeing which diagnostic led goes out first, once that is determined you can get the shorted part replaced, this will not be a do it yourself repair, you can check the led`s as I said to see which goes out first but all that will tell you is which power supply has failed, video-tek
I've had the same issue although I don't unplug everything. I turn it off and then unplug it from the wall for 10 seconds then plug it back in. Seems ok after that. Has happened 4 or 5 times over the 10 years I've owned it.
The symptom you have needs to be looked at by a qualified technician for proper diagnosis. There are 9 LED`s ( 8 green, 1 red) in the power supply that light up under normal condition. These LED`s are used to help pinpoint the area of trouble. For example, when power is applied all LED`s but one lights up. The unlit LED may indicate the +27 volt source is bad. That will alert the technician to check components related to the +27v line. Since there are 8 green LED`s and 1 red, each having multiple suspects leads us to Mr Spock`s comment to captian Kirk." there are endless possibilities"
Yes you can first try this:. Red status LED, self-diagnosis error 44, check for open F9A06 on the Power PCB part # 283P128050 on the Power PCB 2. Red lamp LED, self diagnosis error 34. Check for 5-volts DC at J-9 connector pin 1 and 2 on the Engine Driver PCB if missing replace the Power PCB part # 930B921002 3. LED stops blinking after 70 seconds of plug in but will not power on. This model is equipped with a keyboard lock feature, this can be mistaken as a no power condition. To unlock the keyboard press and hold the "menu" button on the front panel for 10 seconds 4. LED stops blinking after 70 seconds of plug in but will not power on. Check for 3.2 volts DC at connector LE pin 3 and 4 on the Control PCB, if low suspect problems with the switches/buttons on the Control PCB part # 935D776001 5. LED stops blinking after 70 seconds of plug in but will not power on. Keyboard is not locked and key inputs at connector LE pin 3 and 4 check good. Suspect the E2P PCB part # 934C121001 6. LED does not stop blinking after 70 seconds of plug in. Disconnect the USB connector from the card reader to the front from the Chassis, if the unit will then boot up replace the Card Reader part # 299P271010. 7. LED does not stop blinking after 70 seconds of plug in. Disconnecting the USB connector from the Card Reader did not help. Suspect the DM PCB part # 934C116002