HDMI port problem on my sansui 32"LCD TV, model SFL 32HMA-FLA. It runs for 1hour 30 min approx, Then it shows no signal. After restarting the TV it runs for 5 to 10 mins. All other ports are working.

An aux cable is designed for transmitting analog audio signals and cannot carry video signals. The Sansui SV21E11G TV also does not have any built-in features for screen mirroring or connecting to mobile devices wirelessly, so you will need to use an external device to connect your Samsung A32 to the TV.
Using an HDMI cable is a simple and straightforward method to project your Samsung A32 to your TV. HDMI is a digital signal that can carry both video and audio signals, and most modern devices come with an HDMI port. To use this method, you will need an HDMI cable and an HDMI adapter or connector for your Samsung A32, if it doesn't already have an HDMI port.
Wireless screen mirroring devices, such as Chromecast or Miracast, allow you to wirelessly project your smartphone's screen onto your TV. These devices use Wi-Fi Direct technology to create a direct connection between your Samsung A32 and the TV, and they can mirror the contents of your phone's screen in real-time. To use this method, you will need a compatible screen mirroring device, a Wi-Fi network, and a compatible TV with an HDMI port.

You'll have to replace the main board of your TV. You can get the part from here: TV Parts Universal TV Stands DLP Chips ShopJimmy

change source to AV or HDMI or RGB or Component or USB and try

Hi, what device or devices have you tried to connect through those ports? Were they working prior to this problem?

Check and replace its back-light inverter board. If you wish to get some details, check the site linked here. Pull up older posts. Check the site in 'Mosaic' view. It will make search easy. http://electronicshelponline.blogspot.com/ Electro help

Looks like your laptop has a HDMI port. Simply connect to LCD (HDMI if supported) port and make sure LCD is set to correct input (HDMI). It should be plug and play, but try connecting and then powering laptop, then LCD, then choosing input port on LCD.

You will need to replace your signal board the HDMI plugs are located on the signal board.
You can get parts for this TV at www.interliquidparts.com

One of 2 things happened here. Either your T-con board is defective and needs changed, or your Panel is defective and you need a new TV.

No,try websites like Ebay.com or Amazon.com to buy a HDMI cable.Plug the HDMI cable in ur computer USB hub and the other side of the HDMI cable to the tv HDMI hub.Go into tv menu goto the tv find the wright input of the HDMI cable is in ur tv input there it is ur LCD Tv as a computer monitor.

The tv Tuner board that recieving the incomming tv signal broscast is defective.Tries Websites like Shopjimmy.com,Ebay.com to buy a refurbish Tuner board for the replacement.