Why is my Dell W3706MC TV hard to turn on?

Dell W3706MC 37 in..
what does the small TV HDMI connect to , I can not see or guess your connections at all.
a sound bar?, I am guessing , why not just say what you are attempting, in detail.

Fault with main board. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/

It may have bad T-CON or main board problem. If you can post the pictures, that will help alot.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

http://s807.photobucket.com/home/budm/allalbums

http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make a kit for you.

You can get the power supply here:
http://www.shopjimmy.com/catalogsearch/result/?q=Dell+W3706MC+

Remove the stand, all screws from the back, then use very thin wide flat blade screw driver to separate the back from the front.

Hook an external Stereo Receiver (or surround sound system) up to the Audio Out jacks on the back of the TV... this should allow you to hear the sound again.
Hope this helps.

you will need to check you AUDIO SETTINGS on the TV and set it for HDMI

your mainboard needs replaced from within you engine component located in the rear part of the unit. its the boad with the most inputs. google the board id and see if u can find a replacement.

While the TV is turned on, perform the following steps to hard reset the TV:

1. Press and hold the Input Source button.
2. Press and release the Power button.
   The TV turns off.
3. Press and release the Power button.
   The TV turns on.
4. Wait 10 seconds.
   A message appears saying the TV has been reset.
5. Release the Input Source button.

Sounds like a bad video board. No easy way to fix a bad video board. It needs to be replaced. That is why the repair shops will not fix it; they do not stock video boards for all models. And it is a pain to track one down all of a sudden. Once a warranty is up, you are running on bonus time. Electrical components have a definite lifespan. It is possible to recover some money by selling it "as-is" online somewhere. You could get 200-400 for it broken, pretty easy I suppose.

I do have sound board in stock.
Please contact me at:
[email protected]