Results 1 to 14 of 14

Thread: HDTV won't detect signal from PC - any ideas?

  1. #1
    Member
    Join Date
    Aug 2005
    Location
    London
    Posts
    151
    Thanks
    0
    Thanked
    0 times in 0 posts

    HDTV won't detect signal from PC - any ideas?

    So!

    Having got my shiny new 40" Samsung home, I thought I'd hook it up to my Media Centre (Vista Ultimate x86) PC. I'd cunningly pre-bought a DVI -> HDMI cable from Scan and tried plugging this in, to no avail. Luckily, the TV also has a 15-Pin D-SUB input, so I used a normal monitor cable to connect this and it works.

    I'm using an old PCI-E Radeon x1300 with DVI and D-SUB outputs, so having gotten the D-SUB output working, I re-connected the other cable and set the display mode to clone. The TV still wouldn't recognise an HDMI input, even though in CCC, the graphics card detects a Samsung TV on both outputs, and happily outputs 1920x1080 at 60Hz in clone mode.

    Anyone have any ideas how I can convince the TV to accept this input?

    Many thanks!

  2. #2
    Lovely chap dangel's Avatar
    Join Date
    Aug 2005
    Location
    Cambridge, UK
    Posts
    8,398
    Thanks
    412
    Thanked
    459 times in 334 posts
    • dangel's system
      • Motherboard:
      • See My Sig
      • CPU:
      • See My Sig
      • Memory:
      • See My Sig
      • Storage:
      • See My Sig
      • Graphics card(s):
      • See My Sig
      • PSU:
      • See My Sig
      • Case:
      • See My Sig
      • Operating System:
      • Windows 10
      • Monitor(s):
      • See My Sig
      • Internet:
      • 60mbit Sky LLU

    Re: HDTV won't detect signal from PC - any ideas?

    Which sammy matey? I've got the 87BDX 40" running fine in 1080p from my system. Try using HDMI2 (lower connector on the back as I remember) on the TV (if not already). I've tried both a 8800GTS and a 2400XT (ATI) and both worked fine on that input. Note you need to set the TV to 'just scan' so that it doesn't scale the input too.

    I've not had both cables connected at once.
    Crosshair VIII Hero (WIFI), 3900x, 32GB DDR4, Many SSDs, EVGA FTW3 3090, Ethoo 719


  3. #3
    Member
    Join Date
    Aug 2005
    Location
    London
    Posts
    151
    Thanks
    0
    Thanked
    0 times in 0 posts

    Re: HDTV won't detect signal from PC - any ideas?

    Thanks for the reply - it's the LE40N87BDX (catchy names, those Samsungs!)...

    Forgot to mention that I've tried all of the HDMI ports, but most of my attempts used port 2 as the manual mentions something about this port being DVI compatible?

    I would be happy to stick with the VGA connection, but there's a little bit of inteference which manifests itself as slight banding moving down the screen. This should disappear if I can get the HDMI working!

    It's odd though, since the PC can detect the TV but not vice-versa...

  4. #4
    Geek in training
    Join Date
    Dec 2007
    Posts
    653
    Thanks
    212
    Thanked
    47 times in 31 posts

    Re: HDTV won't detect signal from PC - any ideas?

    possibly a bit of a noob comment, but this happend to my brothers LCD when he tried outputting from his PC, it turned out to be the resolution being too high?

  5. #5
    Lovely chap dangel's Avatar
    Join Date
    Aug 2005
    Location
    Cambridge, UK
    Posts
    8,398
    Thanks
    412
    Thanked
    459 times in 334 posts
    • dangel's system
      • Motherboard:
      • See My Sig
      • CPU:
      • See My Sig
      • Memory:
      • See My Sig
      • Storage:
      • See My Sig
      • Graphics card(s):
      • See My Sig
      • PSU:
      • See My Sig
      • Case:
      • See My Sig
      • Operating System:
      • Windows 10
      • Monitor(s):
      • See My Sig
      • Internet:
      • 60mbit Sky LLU

    Re: HDTV won't detect signal from PC - any ideas?

    Quote Originally Posted by eshrules View Post
    possibly a bit of a noob comment, but this happend to my brothers LCD when he tried outputting from his PC, it turned out to be the resolution being too high?
    Could be - but this TV does 1080P just fine for me.

    Ok anyway - we've got the same TV so I know it does work on port 2. Does it work at lower resolutions as suggested? You don't want to stick with VGA as it's nowhere near as nice quality IMHO. Try a low res in single output mode first - just to the hdmi port (i.e. disconnect the VGA cable). You should (no matter what) see the bios screen during bootup on any card (I did with both the cards I mentioned).
    Crosshair VIII Hero (WIFI), 3900x, 32GB DDR4, Many SSDs, EVGA FTW3 3090, Ethoo 719


  6. #6
    Atari Falcon 030
    Join Date
    Feb 2006
    Posts
    1,066
    Thanks
    63
    Thanked
    26 times in 25 posts
    • bigblue's system
      • Motherboard:
      • K8N
      • CPU:
      • X2 4200
      • Storage:
      • 250 Gb WDC
      • Graphics card(s):
      • XFX 7900GT
      • PSU:
      • Tagan Modular 430W
      • Monitor(s):
      • NEC 20WGX2
      • Internet:
      • BT Yahooseless

    Re: HDTV won't detect signal from PC - any ideas?

    Have you any way of trying the cable on something else ?! Could just be a duff cable, though if the graphics cards are detecting the display it's unlikely.

    Maybe a HDCP problem ?

  7. #7
    Lovely chap dangel's Avatar
    Join Date
    Aug 2005
    Location
    Cambridge, UK
    Posts
    8,398
    Thanks
    412
    Thanked
    459 times in 334 posts
    • dangel's system
      • Motherboard:
      • See My Sig
      • CPU:
      • See My Sig
      • Memory:
      • See My Sig
      • Storage:
      • See My Sig
      • Graphics card(s):
      • See My Sig
      • PSU:
      • See My Sig
      • Case:
      • See My Sig
      • Operating System:
      • Windows 10
      • Monitor(s):
      • See My Sig
      • Internet:
      • 60mbit Sky LLU

    Re: HDTV won't detect signal from PC - any ideas?

    HDCP doesn't affect basic display though - it's only relevant when decoding DRM infested discs.
    Crosshair VIII Hero (WIFI), 3900x, 32GB DDR4, Many SSDs, EVGA FTW3 3090, Ethoo 719


  8. #8
    Atari Falcon 030
    Join Date
    Feb 2006
    Posts
    1,066
    Thanks
    63
    Thanked
    26 times in 25 posts
    • bigblue's system
      • Motherboard:
      • K8N
      • CPU:
      • X2 4200
      • Storage:
      • 250 Gb WDC
      • Graphics card(s):
      • XFX 7900GT
      • PSU:
      • Tagan Modular 430W
      • Monitor(s):
      • NEC 20WGX2
      • Internet:
      • BT Yahooseless

    Re: HDTV won't detect signal from PC - any ideas?

    There's been a few Samsung displays that have had problems with HDMI-DVI, and it's usually blamed on an HDCP issue. I'm sure I read somewhere that there was faulty HDCP hardware in some sets.

    Most commonly with people trying to hook up consoles to monitors though, rather than PC's to TV's !

  9. #9
    Lovely chap dangel's Avatar
    Join Date
    Aug 2005
    Location
    Cambridge, UK
    Posts
    8,398
    Thanks
    412
    Thanked
    459 times in 334 posts
    • dangel's system
      • Motherboard:
      • See My Sig
      • CPU:
      • See My Sig
      • Memory:
      • See My Sig
      • Storage:
      • See My Sig
      • Graphics card(s):
      • See My Sig
      • PSU:
      • See My Sig
      • Case:
      • See My Sig
      • Operating System:
      • Windows 10
      • Monitor(s):
      • See My Sig
      • Internet:
      • 60mbit Sky LLU

    Re: HDTV won't detect signal from PC - any ideas?

    Only if the set expected HDCP always to display anything - surely? That doesn't make sense to me..

    If he can't see even the bios flashing up it's probably the cable, otherwise in Windows it's a configuration problem in the signal being output.
    Crosshair VIII Hero (WIFI), 3900x, 32GB DDR4, Many SSDs, EVGA FTW3 3090, Ethoo 719


  10. #10
    Atari Falcon 030
    Join Date
    Feb 2006
    Posts
    1,066
    Thanks
    63
    Thanked
    26 times in 25 posts
    • bigblue's system
      • Motherboard:
      • K8N
      • CPU:
      • X2 4200
      • Storage:
      • 250 Gb WDC
      • Graphics card(s):
      • XFX 7900GT
      • PSU:
      • Tagan Modular 430W
      • Monitor(s):
      • NEC 20WGX2
      • Internet:
      • BT Yahooseless

    Re: HDTV won't detect signal from PC - any ideas?

    Yup, I think that was the issue. It wouldn't display anything over HDMI without a handshake. Pretty sure someone on here had the issue a while back

  11. #11
    Senior Member
    Join Date
    Jun 2007
    Location
    Newcastle, England
    Posts
    684
    Thanks
    42
    Thanked
    8 times in 8 posts

    Re: HDTV won't detect signal from PC - any ideas?

    I'm having a strange problem in that my new Media Center PC that I built has a HDMI port and I've plugged it into the HDMI port on the TV. It works fine but if I change the channel and then back again sometimes the screen is blank and only comes back on after a reboot.

  12. #12
    Registered User
    Join Date
    Aug 2008
    Posts
    1
    Thanks
    0
    Thanked
    0 times in 0 posts

    Re: HDTV won't detect signal from PC - any ideas?

    Quote Originally Posted by slypie View Post
    I'm having a strange problem in that my new Media Center PC that I built has a HDMI port and I've plugged it into the HDMI port on the TV. It works fine but if I change the channel and then back again sometimes the screen is blank and only comes back on after a reboot.
    to Slypie

    Hi

    I have the same problem, i have a philips 37pfl7662 and when i change channels the tv lost the signal from computer. Did you already solved your problem?

  13. #13
    Registered+
    Join Date
    Mar 2011
    Posts
    21
    Thanks
    0
    Thanked
    0 times in 0 posts
    • tasman26's system
      • Motherboard:
      • Asus P8P67 Pro
      • CPU:
      • 2500k
      • Memory:
      • G.Skill Ripjaws-X 4GB (2x2GB) DDR3 PC3-12800 1600MHz
      • Storage:
      • WD 1TB 7200rrp
      • Graphics card(s):
      • Gigabyte SOC GTX560Ti
      • PSU:
      • Corsair Tx850
      • Case:
      • Cooler Master CM 690 II
      • Operating System:
      • Win 7 Ultimate x64 Sp1
      • Monitor(s):
      • ViewSonic 24
      • Internet:
      • 20MB

    Re: HDTV won't detect signal from PC - any ideas?

    chceck graphic card mate , it possibly graphic card issue. try witch different one

  14. #14
    Lovely chap dangel's Avatar
    Join Date
    Aug 2005
    Location
    Cambridge, UK
    Posts
    8,398
    Thanks
    412
    Thanked
    459 times in 334 posts
    • dangel's system
      • Motherboard:
      • See My Sig
      • CPU:
      • See My Sig
      • Memory:
      • See My Sig
      • Storage:
      • See My Sig
      • Graphics card(s):
      • See My Sig
      • PSU:
      • See My Sig
      • Case:
      • See My Sig
      • Operating System:
      • Windows 10
      • Monitor(s):
      • See My Sig
      • Internet:
      • 60mbit Sky LLU

    Re: HDTV won't detect signal from PC - any ideas?

    Quote Originally Posted by tasman26 View Post
    chceck graphic card mate , it possibly graphic card issue. try witch different one
    THREE YEARS too late
    Crosshair VIII Hero (WIFI), 3900x, 32GB DDR4, Many SSDs, EVGA FTW3 3090, Ethoo 719


Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Mobile Phone with Strong signal reception, Please help!!
    By donmezz in forum Smartphones and Tablets
    Replies: 6
    Last Post: 25-01-2008, 06:54 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •