Power died. TV was running then there was a short hiss followed by a pop and the tv died. Is it just a power unit problem. ie like replacing a computer CPU when it dies.

hissing noise will be from high voltage regulator, i would suggest to do following:

1. switch tv off
2. remove plug from the wall
3. using air blower (compressor attachment - not leaf one!) blow the dust, especially from high voltage box section
4. connect the tv and switch on

if tv still issue hissing noise - follow 1 and 2 then:
3. remove back cover
4. use air blower again...
5. re-install back cover
6. reconnect tv and switch on

if hissing noise persist - check for blown capacitors on high voltage, replace if necessary, they have nasty tendency to pop if they are too long in storage, especially if tehy were overheated or frozen.

hope this will help you solve the problem, do not forget to vote...

The tv power supply board,have blown capacitors components parts most likely.Don't tries to repair this power supply board though,because a loud poping sounds and heavy smoking have many more other components dies also just not easy to be seen as capacitors parts.The tv power supply board that the board,where the tv power a/c cord plug into it.Take the tv aparts.Tries websites like Shopjimmy.com,Ebay.com to buy a whole new refurbish power supply board for the replacement.

This is a protection circuit that prevents the tv from coming on (to stop damage of the components) ....you need to check your voltages off the power supply and make sure they all read well (EX: 24v12v5v etc). Also look for popped capacitors that would make the values lower than need be for the tv to power on properly.

The hiss is a popped (blown) capacitor! You need to replace it before you keep trying to power on the tv...you will cause more damage

Please rate if this helps!

The Hissing is the High Tension electricity. Sounds as if this section has failed. Developed a partial short of some sorts in the HT section or Power Supply. It seems that your unit has some sort of HT side, PSU fault, or a problem to the HT section that is shutting down the Power Supply Unit, PSU. This happens so that no further damage, and possible fire will occur.
You need to take the unit to a reputable service centre/man and ask for a firm "Quote" for the work to be done.

Stop trying to turn on the set. You are causing more damage. The hissing sound you are hearing is either a High Voltage Transformer on the SMPS (Switched Mode Power Supply) indicating a short somewhere in the set or some capicitors that have shorted out. Also there can be a CRT that is leaking cooling fluid onto the Main bd or the Power/Deflection bd or both bds. Have a trained Samsung tech troubleshoot the set.

There are a number of things that could be wrong.
The basic first thing to try is to replace the cable(s) that feeds your TV signal; sometimes the connection with the connectors on the end goes bad.
HDMI or what ever feeds your signal. You can make your own RCA or traditional F type coax connector with the connectors from this site or you can buy what you need for composite or RCA at your local store. This could be the problem if the signal has just stopped coming over. hopefully that is the problem.

Next is the bulb in the bulb should be checked. In an LCD it can just happen. the light dies. if you are getting no sound and no image the bulb is likely not the problem.

You may have a short or bad resistor or transistor. the board that controls your TV might not be getting proper power, be it too much or too little. If you suspect this is the case leave the TV off, that pop could be a power surge flowing over the components of the TV. and could do further damage.

Depending on the value of the TV you should consider recycling. Replacing a TV under 300 or 250 is worth it. a warranty is included. an involved repair could run 300-400 dollars or more, but on a big screen TV that costs over 2,000 a repair is a good value.

-good luck-

Will

Check power supply transisters possible shorted
and check transister next to ht runs picture may be shorted also check diodes 4off runs ac to dc
changover , this possible causes the fuse to blow , allways be carefull when pluging any
electrical item in
please let me know how you go thanks jeff..........

Check the following :

1. when you switch on the TV will you get any burnt smell near TV,will it try to on or will it make any hissing sound .

if there is any hissing sound there may be some short circuit happening inside ..
if it doesnt tries to on then the powr supply might not be coming to the screen or the CRT might have got damaged ..,, if this is the case then CRT must be replaced ...

if the power is not coming to the screen then there may be some problem in the transformer or due to some short circuiting some of the component might have burnt you need to identify that and replace that ... this solves your problem ..

thank you
regards

-Dileep

Contact Archos support and they can provide you the file to repair your disk. Once you have the file stored on your computer, you will then hook up your Archos via USB and copy the file they provide you to the root of the Archos.
The direction I got when trying to fix my pop/hissing
"If you power on the unit by pressing and holding the TV/LCD button and power button simultaneously the unit will boot into a recovery screen. Once in this screen choose "Repair Disk" and follow the on screen instructions.

When prompted, please place the following file into the 'root directory' of
the unit:

http://update.archos.com/5/a605/a605_r2.1.04/firmware_a605.aos
"

Hope this helps.

Sound not so good. You probably have a bad flyback transistor and now the power supply is fried also.If your lucky all youll have to do if your a tech and only if your a tech is to replace the Hi voltage transformer and the horizontal output transistor. Now these sets have high voltage still around there componets even when the sets unplugged, so please if you wanna invest in the set take it to a pro to assist you in this repair. Good Luck