Question about Samsung HLN437W 43" Rear Projection HDTV

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DLP won't fire up...

TvTech_ Appreciate any help you may be able to offer. I have a Sammy DLP HLN437W - I replaced noisy color wheel about 7 months ago it was was working great with nearly 15,000 hrs on the orig Phillips bulb. Last week there was an electrical storm - a BR breaker released and the TV went off - nothing else. Even the Comcast DVR stayed on along with house lights, etc. TV was plugged into a decent/fused surge protector - it didn't trip off. I figured it was a coincidence the TV went out - that the old bulb finally gave up. I was getting the green 'lamp' light blinking for about 30 sec cycling three times , then it would go to all three lights blinking (indicating bad lamp). So I got a newer Philips E20 vented lamp (100w/120w w/ adapter) when I plug  in TV I get ONLY the 'lamp' green light blinking continuously - not cycling to refire - only green light blinking?? I called DM where I got the bulb - suggest it MAY be the ballast? My question: How can I determine between a bad 1) ballast 2) Power source or 3) DMD (other) ??? Just so I purchase one part instead of several to fix my set. Thanks! Bill     I'm having the same problem as well. I replaced the bulb (same one from to no avail. I then replaced ballast, hoping it was the issue. However, the new ballast did not correct the problem. What would be the next step: power supply, DMD or take the set in to an authorized Samsung repair facility (I don't really want to take the set in & pay full retail for parts)?


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Highland Electrix TV Repair Advice lo300v PagePower supply may be faulty
The Psu are Just like any Psu using SMPS(chopper), so use normal PSU fault finding techniques
Start with , Any power from secondary of chopper transformer, at the diodes) usual PSU voltages are 5v,3.3v 12v (the 12v feeds the CCF tubes power generators)
If yes the psu ok, If no check for 320v across mains smoothing capacitor
If 320v ok but no output, check for shorts on the output lines (schottly diodes)
If the PSU is running and there are any leds glowing on the front
check to see it the flurecent tubes (on each side) are glowing
they usually have their own supply generators powered by 12v from PSU

Posted on Jul 26, 2008

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Try first unplugging power cord, see if it reset.

Posted on Jul 26, 2008

  • Ginko
    Ginko Jul 26, 2008

    Well there are two different problem posted in there , apart from the storm they do not have much in common.
    You should not replace tv parts without testing them, it can cause more troubles.
    tell me how many times the led is flashing


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