I've connected the minijack from the laptop to the phono slots red and white on my tv but there is no sound. Could you help me please

Hi It is possible, the phono cable Red White and Yellow connectors is all you need to use, plug red and white into tv Audio out socket and into the red and white dvd audio in socket. hope this helps, for this to work.

sound is not transfered through hdmi from a laptop you will need another lead for sound which is a 3.5mm jack to rca / phono the phono plugs in to the red and white sockets on your tv

Hi
HDMI is only used for Video output and not for sound, you will have to use your laptop audio out (has a pic of headphones), you are able to get headphone jack to phono (white / Red) cable to connect to TV or surround sound system or your laptop speakers.
Regards
David

Your cable must be a minijack to 2RCA. Minijack connected at line out on computer and 2RCA at AV1 in or other available port in on HHTS(Home theatre) (white and red socket). That is sound only. Video will be yellow (or vga/DVI/HDMI depending on graphic card)from your graphic card to AV1 in. same port as sound. Now select AV1 on HTS. If no picture on tv make sure you computer graphic card is set for dual display .

If you select component in on the tv, this should give you a picture,using the current set up. As for audio, depending on the tv, have you used audio in on the tv, or audio out?
It sound obvious but I (even after 5 years+ of installing tv/vcr/dvd) still get caught out with input and out put.
I am unfamiliar with Sansui dvd, if it has a scart connection on the back then yes you can connect to a spare scart on the tv. If it has the single yellow phono for video and the red/white phonos for sound, you can buy a scart to phono lead and use that, not to confuse with the component(blue/green/purple) connections. You cuold also connect the yellow/red/white phono to the same on the tv front/side or rear if available.

you will need a 3.5mm TRS minijack to stereo RCA (red & white)lead.
Connect the headphone-out of the laptop to a line input on the reciever - one of the following inputs should work: CD, CD-R in, Tape in. Do not connect to the Phono input
set the output volume of your laptop about 50% to avoid distortion.
As for connecting the amp to the LCD, it really depends what inputs your screen has, but if you can- run HDMI.

Sound more like your problem is with the connection to the TV. Make sure the connection at the TV is to an 'input' connector and not 'output'. Also, from the TV menu, if you can select the output the laptop is using make sure the sound is stereo an not 5.1 or 7.1 or something to that effect. All other connections seem to be in good shape. Good luck.

comp sound Tv

Your cable must be a minijack to 2RCA. Minijack connected at line out on computer and 2RCA at AV1 in or other available port in on TV (white and red socket). That is sound only. Video will be yellow (or vga/DVI/HDMI depending on graphic card)from your graphic card to AV1 in. same port as sound. Now select AV1 on tv. If no picture on tv make sure you computer graphic card is set for dual display .

Since you have a surround sound system, you probably should just bypass the TV's audio.

Connect the red/white plugs from your digital cable box to one of the inputs on your surround sound system but not the Phono input unless the Phono input lists something aside from Phono, like Aux/Phono or CD/Phono.

Connect the S-Video or composite (yellow) video plug from your digital cable box directly to the S-Video or composite (yellow) video jack on your TV.

If your digital cable box does not have a S-Video (4 pins and flat rectangular hole) or Composite (yellow RCA jack) jack and only has the screw/push-on type cable with the pin in it, then leave the remaining connections as-is.

Now switch your surround sound system to the input you connected the red and white plugs to and turn on your TV. You should see picture from the TV, but hear audio from the surround sound system.

You need to wire up the audio from the computer.
The 15 pin cable is only the video, next to the input on the tv should be a red and white phono connector which should say audio or line in, get a cable that has a headphone type jack on one end and 2 phono red and white plugs, connect the headphone jack into the back of the pc, should be the green audio out where you would usually connect pc speakers, then the phono plugs into the back of the tv and insert them into the phono ports on the back of the tv that say line or audio in. Turn the TV to PC and thats it.

hope this helps