Question about Samsung HCL4715W 47" Rear Projection Television

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Power just clicks on and off and the red power led remains on

Just before the extended warranty the converance went out and was replaced, now about 6 months later the set will not power up. Just looking for a little direction, I can do some repairs and troubleshooting myself and our local repair shop gave up without a repair schematic but I've located one and have a copy on hand. Thanks.

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Re: power just clicks on and off and the red power led...

Check for a shorted transistor Q473, and R468 may be open as well (0.47 ohm @ 2 Watt). If it is shorted, try to find a good replacement part as the Samsung Part Aa96-00037a is No Longer Available. Also there is a possibility that the High Voltage block is also bad, if so, replace with Part Aa26-00101a. Good Luck!

Posted on Feb 11, 2007

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I was watching tv and i heard a loud pop.then my picture went out but i had light in the front comes on model number is 50pl9126d/37

If it is a lamp led light in the front panel, this is an indication that the lamp is not working. Pop sound was came from the electrolytic capacitor most probably in the ballast board that's why the lamp is dead. When the ballast board gone to malfunction, no high voltage will feed to the lamp resulting to that kind of symptoms.
Faulty capacitor has a physical indication of fault like bulged/dome at the top. Check the ballast board and inspect the capacitor. If you found it faulty, I would advice you to replaced the entire ballast board if you can't troubleshoot it yourself. Click this LINK for the replacement.

Also, check if your unit is still under warranty/extended warranty period, avail it because the manufacturer will fix it for free. Opening the back cover will void the warranty.

Hope I helped you.

Have a nice day!

Thanks for using Fixya.


Jun 22, 2011 | Philips 50PL9126D/37B 50" DLP TV

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Sony KDS55A2000 Red Blinking Light Issue

first off
For the KDS55A2000, 9 blinks, pause, 9 blinks means "Device error" and the probable cause locations listed are as follows:

1. Temperature sensors
2. Bus decoder ICs (IC2000, 3150, 3200, 8804)

These are starting points for qualified service technicians. There is a service bulletin for this issue, but it is intended for use by qualified service technicians.
I found that it refers to a problem in the "zero crossing detector" circuit on the "G" board. I resourced the part from an electronics warehouse and found out that the "G" board has a known weakness and high failure rate The part cost me $73+$47 fedex shipping
The "G" board may be the only "plug n' play" board in the whole set

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1 Answer

TV was working fine when we went to bed Monday (August 30) night. Got up the next morning and turned it on. It appeared it was going to come on, the green light flashed and then the lamp indicator light...

1. 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 plug in) Disconnect the USB connector from the card reader to the front from the Chassis, if the LED stops blinking after 70 seconds replace the Card Reader part # 299P271010. 7. (LED does not stop blinking after plug in) Disconnecting the USB connector from the Card Reader did not help. Remove connector FC from the FMT PCB and plug the unit in, if the LED stops blinking after 70 seconds with FC removed suspect a problem on the FMT PCB (part # 930B924002), if the LED keeps blinking with connector FC removed suspect a problem on the DM PCB (part # 934C116002). 8. (LED does not stop blinking after plug in) On the DM PCB (part # 934C116002) check C81A2, C81A3, C81B3 and C81B4 (1000 UFD, 16V, 105C), if any are bad, replace all of them with part # 181P734030 (680 uFD, 16V, 105C). See Service Tip VS-78A 9. (LED does not stop blinking after plug in) On the FMT PCB (part # 930B924002) check C8F19, C8F21, C8F22, and C8F27 (16V 1000 UFD 105C), if any are bad, replace all of them with part # 181P734030 (680 uFD, 16V, 105C) See Service Tip VS-78A

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