Question about Samsung HCN436W 43" Rear Projection Television

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Samsung SP42Q2HD standby fault

I have had this tv for 16 months bought brandnew but for some reason it went into standby and thats as much as its does now,

anyideas or do i throw it out

thanks in advance alan

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Re: samsung SP42Q2HD standby fault

No need to change complete def.board?? just change the stk, chips in the set! they can be located on the cooling fins, think their stk-120 or such, 140-110 ect, replace both not just single. failing that you should change all the resistors, there should be 10 of or 12, depending on what stk chips are present, think there 3.9 ohms,.good luck

Posted on Oct 14, 2008

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Re: samsung SP42Q2HD standby fault

Tha convergence /def. board is faulty,change as a unit.

Posted on Mar 28, 2008

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This could literally be anything. I have a tip at which will walk you through the troubleshooting procedure and help to isolate the problem and tells you where to get parts.

Thanks for using FixYa and for the great rating.


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Projection TV Phillps 60PP9202/17F, bought 2004. Was watching and suddenly the picture went out. All connections are good and components work. Can you help?


If there is no power at all, then it is either the power cord or power board inside the TV.

If after the fault the TV went in standby and does not wake up, then the TV is in protect mode.

In protect mode higher voltages from PSU gets shut down and TV remains in standby.(see also Why my TV does not start up and remains in...)

Try first leaving the TV power cord unplugged for some times, let say one hour or so. Then connect powr

If that does not work, and you keep having the TV in protect mode, it means that there is a fault.

In that case call the support number listed on Philips user manual to arrange repair.

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If it is the main fuse that is being smoked, there are a number of possibilities:

1) Since this is a CRT based set, the most common failure os of the horizontal output transistor. This goes shorted which causes too much current draw on the power supply and it pops hte fuse.

2) The switch mode power supply transistor has shorted.

3) Failure of the primary side capacitor.

Without seeing the set and taking some internal measurements, I can not state for sure the exact problem with your set. Since there are potentially dangerous high voltages present inside even when unplugged, I would suggest that you get a detailed repair estimate from a local service shop and post the results here. We may be able to walk you through the actual repair.


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1 Answer

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When this happens higher voltages are shut down to prevent further damage.

Try first leaving the TV power cord unplugged for some times, let say one hour or so.

Also ensure that the fault is not coming from a faulty receiver box sending bad signal, check if you get same problem with no receiver box or dvd connected.

If that does not work, and you keep having a flashing led on front of the TV, and tv turning off by itself after a while, that indicates a fault condition.

The flashing light indicates a diagnostic state called protection.
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2 The protection circuit detected a wrong voltage or abroken contact, identified an internal fault and kicked in , startingthe flashing light.

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If you are in situation 2 , then there is an internal fault.

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If under warranty contact the manufacturer ringing the number on the user manual

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