Question about Thomson 29DM400 29" TV

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INTERMITTENT SUPPLY hi, I would like to ask for some assistance with regards to the model PS31108 by thompson. The filter capacitor 680/200v from the power supply blown off and when I was able to restore it, there is ** sound output anymore. Please help. Cordially, Chris de Leon Philippines

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Hi there, a defective filter capacitor means a more defective parts near that part, do some test and check up with the rectifiers, resistors, and regulators. just consentrate on power supply section. ty

Posted on Mar 10, 2008


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I repaired a tv set which has the same symptom. The problem was overvoltage as a filter capacitor in the line supply dried up and the voltage got out of control. I replaced both line supply filter capacitor and the RGB supply filter capacitor (47uF/250V) and the fault was fixed.
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Hello Our Thompson Speedtouch modem (which we've had for a couple of years) is not working properly, it keeps losing the connection to the internet. There are five green lights on the front of the...

Appreciate you asking, Terry.

Without directly having your modem in front of me, I'll have to surmise that Electrolytic Capacitors inside the modem have gone bad.

These capacitors are used as Filters.
After a given time they break down. In fact the designer knows this, and uses capacitors that are 50 percent better than what is required.

One wouldn't think that within a two year span the unit would breakdown, but there are many variables that can add to their demise.

1) Power outages

2) Dirty inside, (Use a can of compressed air in the vent holes occasionally. There is no fan inside, and air is used to cool the components inside. Unit UNPLUGGED from power)

3) Low quality components used inside the modem. Especially Electrolytic Capacitors.

My recommendation would be along the same as yours.
Buy a new modem.

You didn't state the Model Number, so I don't know if it is a wireless unit, or not, nor do I know if it is a cable unit.
Wireless, of course will be more expensive.

A couple of recommendations from a quick search.
Not advertising for said website, nor manufacturer,



A visual guide to bad 'caps',

Should you have any further questions please do not hesitate to ask. Post in a Comment.


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Very smart, right? You send my an e-mail asking if I need assistance to solve my problem but offering a "premium assitance plan" wich means "fee" and on the top of it in case if I already fix my problem you ask me how I did it, that way if somebody else have the same issue you take "my advice" and charge for that. I don't think this is any fear. To who ever read this post be aware of this scamers.

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This issue occurs due to a faulty ballast or due to overheating inside the TV. You'll need to check for swollen capacitors on the TV power supply board and also would need to check if the cooling fans are working fine.

Please tell me the model and ,make of your TV si that i can tell you where to buy the parts and also provide you details regarding the replacement.

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Hi brendanram!

I am claudus_07 and i was a Dell - XPS Technical Support Specialist before so i will be glad to assist you with your concern.

As you said into your post, you tried plugging the AC Adapter to the power source without plugging the other end into the XPS laptop and the Green Light on the adapter is lit. But when you plug the jack on the laptop, the Green light is out. As for my experience on your laptop, there could be a problem with the power supply or the motherboard of your XPS laptop. Because everytime you plug the adapter to the laptop, the green light is going out so it means that the laptop or the adapter is grounded.

Here's what you need you to:

Step 1: Call Dell XPS Technical Support 1-800-624-9896
Step 2: Tell them the issue and the things that youve done.
Step 3: At the end of the troubleshooting, i know that the Technician will either replace the Power Supply, Motherboard, or the Adapter. (if you have a friend that has a Adapter same as yours, you may try to use it just to isolate the issue the Technician will choose from the Power Supply or the motherboard)
Step 4: If the Technician replaces the power supply and the issue still persists, call technical support again and ask them to replace the motherboard, no need to repeat the troubleshooting steps anymore just tell them that youre already done with it. (Dont ask for a system exchange, because i know that they will not give what you want.)

I know it will work. Be Positive!
Your good rating will be very much appreciated.

Good luck and thank you!

- claudus_07™

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