Buttons not working sound now not working hmdi not working. so frustrating

Your sound bar can be connected to the UA40C500QF. Get an appropriate audio cable based on the sound bar. You'll either need a optical digital audio cable or an analog audio cable with a 3.5 mm plug on at least one side. (If your sound bar has an AUX input, then a 3.5 mm to 3.5 mm M/M audio cable is appropriate. Otherwise, you may need an RCA (M/M) to 3.5 mm audio cable or some sort of RCA to 3.5 mm adapter (F on one side, M on the other).) Connect this cable to the audio out on the TV (headphone or digital audio) and the appropriate audio in on the sound bar.

Set the sound bar source to the chosen input (Aux or Digital In (D.In on some systems). Next, set the TV to use External speakers. This is in the Audio sub-menu. The volume will now be controlled by the sound bar volume control.

You can still use the HDMI cable (HDMI out to any HDMI in on the TV) if you want to use the TV screen when changing the settings on the sound bar. Just change the TV source to that HDMI port with the Source button on the TV remote or on the TV (the left-most button on the front panel). Then change your source back to the video signal for the TV to view items connected to the other HDMI ports. If your sound bar has an HDMI input, you would similarly use set the TV to the sound input to watch that source.

I hope this helps. See the manual for the UA40C500Q for the details on setting the speakers to External speakers. The manual is available on the support page: https://www.samsung.com/au/support/model/UA40C5000QFXXY/ . The current link to the manual is http://downloadcenter.samsung.com/content/UM/201003/20100316163048500/BN68-02727A-00Eng-0225.pdf .

Cindy Wells

Do other inputs work?

If your PC has the HDMI port it is better. It also carries sound.
Of course your monitor must have an HDMI port.

Fault with main board. Damaged component/s at it. 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/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

sounds like you need to update firmware

The button you describe selects betweem HDMI 1 and 2 not working! if this is new, return item to the place of purchase, this is clearly a manufacture defect.

you may have to lower the resolution on your screen for it to show on the tv

switch the HDMI cable to another HDMI port (if available).
or use and AVI/COMPONENT to make sure the device (HOME THEATHER) is working fine.
Try also another HDMI cable or hook another device into it to see how it works.
If you determine the HDMI port in not working properly, then your Mainboard is damaged and need to be replaced, try EBAY for a general picture of prices but you will need your product code wich is located in the back of the TV next to serial number.

I dont have a TV with HMDI input but i do have a computer moniter. To change i have to press a button that changes from VGA to HDMI. My computer supports HDMI and when i tried it, it works. Try looking in your manual for a way to switch input methods.

this is a good one i had the same problem about a year a go on my brothers we tried every thing nout worked i said put the video leads in and do it it worked a treat but i have herd it don't work for all so it sounds like an amplifier my be needed hope any of this can help you. sorry if it don't only trying to help