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Kaitlin
Kaitlin Posted on Sep 23, 2015
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I have a coby tftv4025. Whenever I select any of the three hdmi settings, it automatically changes to dvi and then says no signal. I've tried everything and cannot get it to stay on hdmi

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  • Audio Service Clinic Sep 23, 2015

    If you have the owner's manual, there should be a procedure to reset the TV back to factory default mode. Try that. If that doesn't work, I'm afraid you may have a bad microprocessor(one of the computers inside the TV)

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1 Answer

Audio Service Clinic

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  • Master 924 Answers
  • Posted on Sep 23, 2015
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There are generally settings in a menu that denote what particular input is set for. Try looking for that and select HDMI.

  • Kaitlin Sep 23, 2015

    I know how to select hdmi from the menu, hdmi is selected but it changes it over to dvi after a few seconds automatically and I can't fix it

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5 Related Answers

Anonymous

  • 217 Answers
  • Posted on Apr 16, 2007

SOURCE: HDMI->DVI cable won't work

Get another cable box, the scientific atlanta are notorios for these type of problems

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freakingdogs

  • 1 Answer
  • Posted on Jun 13, 2008

SOURCE: hdtv stb issues hdmi - dvi for Acer AL2416W

Hi
I have a Acer AL2416W and a PS3 and cannot get them to connect using hdmi - dvi
how did you get yours to work

Anonymous

  • 2 Answers
  • Posted on Apr 29, 2009

SOURCE: TV won't recognize signal from a DVI to HDMI input adapter

I had a similar problem with a Mac Mini.  The problem was caused by a mix-matched resolution (the Mac tries to use 75Hz refresh rate, TV expects 60Hz).  The best solution I found was to remote into the Mac (I used LogMeIn.com) and change the resolution on the Mac from a remote computer until the image appears on screen.
Process: 1) Connect Mac to a normal monitor and install the LogMeIn server (or other VNC type application) 2) Connect the Mac to the TV 3) Connect to LogMeIn from another computer (preferrably one where you can see the TV) 4) Go to Applications / System Preferences / Display 5) Change the resolution to your TVs native resolution, and change the refresh rate to 60Hz

Anonymous

  • 105 Answers
  • Posted on May 06, 2009

SOURCE: JVC LT-32DS75SJ issue with HDMI

Try this

1. Turn ON TV
2. Connect PS3 to TV HDMI input
3. select TV HDMI input for PS3
4. turn OFF PS3 if it is ON
5. Press and hold the [I/O]Power button until the PS3 until you get the "HDMI Detected" message.

Also, this TV has a circuit that deactivates the HDMI if the rear cover is removed. It is possible the HDMI may have been turned OFF. This is reset in the service menu of the TV.

Anonymous

  • 10 Answers
  • Posted on May 11, 2010

SOURCE: Philips LCD TV "47, model PFL 8404H/12, NO SIGNAL on all 4 HDMI

This is quite tricky as it was working until last night and suddenly stopped receiving signals. What can happen wrong?
Do you have any other Player or other HDMI cables to try out. Sometimes the cables would be damaged or PC may fail to detect the HDMI.

Try this out from Philips helpdesk where there is new SW and FAQs are available.
http://www.p4c.philips.com/cgi-bin/dcbint/cpindex.pl?ctn=42PFL8404H/12&slg=en&scy=CZ

Let me know if you are not able to upgrade the FW (if you do not get the support on ugprading)

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HDMI and DVI use the same encoding scheme for video purposes- the only difference is HDMI can carry audio signals and therefore have different connectors- so it is not like the lack of a picture signal is because you are using two different cables (HDMI and DVI). In theory the DVI to HDMI adapter should work.
Is there a possibility that the adapter is defective? Any bent or missing pins?
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How to switch from analog to digital mode
Any contemporary monitor is able to switch analog/digital mode automatically if connection from signal source to monitor is set up properly.

Connect digital output from your graphic card to DVI input of the monitor. Disconnect any other signal cables from monitor and switch on both devices (PC & monitor). Wait a while. Monitor checks its inputs and a activates digital DVI, because it is only one active input on it.

If none picture excluding error message of monitor is displayed, go through these steps:
1) Check whether your monitor is set for automatic input selection. If monitor buttons have no response try to use analog input to activate screen (any picture, desktop background...) and then get monitor menu access by pressing menu button.

2) Find out what connector type has your graphics card in PC. Possibilities are: DVI, HDMI, DisplayPort and some their options. See Wikipedia for connector look if you are not sure.
Remember that blue D-SUB (VGA) connectors are analogue and you cannot activate digital mode through analog VGA cable.

3) Use appropriate cable to connect monitor to PC.
Example: Your PC has HDMI output. Use HDMi-to-DVI cable. Your monitor input is DVI and common DVI-DVI cable is not suitable in case you have PC with the HDMI.
Note that DVI-to-DVI, DisplayPort-to-DVI etc. cables are available. You must buy right one.

Be aware that "Auto" button is inactive in digital mode of monitor.
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If you see a no signal message, then it means that the signal output format of the PS3 does not match . It happens if you have previous used it on another tv and now connected it to a different tv. To resolve this, turn off the PS3 . Press and hold the power button on the PS3 till you hear three BEEPS. The PS3 should automatically detect the tv's resolution and the initial setup screen should appear. After that you should just follow on-screen instructions to set it up.
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I have included a couple of links below about DVI & HDMI for your convenience. http://www.datapro.net/techinfo/dvi_info.html http://www.hdmi.org/learningcenter/faq.aspx

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