Question about Pioneer SD-643HD5 64" Rear Projection Television

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Can't get full power on

When I turn on the main power on my set the light goes green for a second then turns to red and I get no power. Any suggestions? Looking for fuse location too.

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  • jasonkraft Apr 26, 2009

    I have the same problem but after replacing the fuse it just blows again when I try to power it back on.



    Jason.

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You all have convergence chip issues and they need to be replaced go to tvrepairkits.com

Posted on Aug 17, 2009

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I have this exact same issue; search engine took me here. I have been experiencing this problem for about a year now. When you power on, the RED standby light goes out, the power light turned GREEN, you might hear a small pop sound, then the RED standby light goes back on. YOU HAVE BLOWN A FUSE. My problem is this is occuring much more frequently now and I'm going through fused like crazy. So I'm looking for a long term solution. To replace the fuse, turn off the standby power switch on the front. Unplug the power cable. Open the back panel. All logic and power modules are on the bottom of the cabinet. Therer is a large power module in the middle. In the middle of this module are 3 fuses. The one that typically blows is the one in the middle. It's a 5 amp fuse, but double check the rating before replacing. Good luck, Mark

Posted on Aug 26, 2007

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Jason. i got this info from ladywinn. fuse 302 5 amp and 303 5 amp. Replace both stkics big black ics- stk 392-180's. Good luck!

Posted on Jan 11, 2011

I have a call in with Pioneer for help. Some additional info. Parts can be found at parts.pioneerelectronics.com . The fuse that is blowing is identified on the PCB as FU303. The part number for the Power Assembly is AWV1887 (OLD model) or AWV2011 (New Model). Depending on what Pioneer says, I'll probably replace the Power module; $311.

Posted on Aug 26, 2007

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Posted on Jan 02, 2017

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When I turn on the TV the green light goes green to red to green to red. If I keep turning it on and off eventually I get a picture. The picture is very dark at first


Sounds like back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electro-medical.blogspot.com/
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced.

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Hello Sagar,
green led means tv powered on and status ok.
Red blinking light almost always means defect, overcurrent or overload.
6 blinks for Sony lcd flat tv means trouble in backlight circuit, or backlight inverter (backlight illumination or lighting makes your tv screen visible).
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Then it goes to standby, red and off.

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same problem here

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