Hi all,
I have a philips model: 15PF5120 showing a "No Signal" condition when connected to a PC using the DVI-I cable input.
No bad cap.s this time. All the electronics checked out 100%.
To understand the problem I had to understand DVI. Judging from the blog community, I am not the only one that needed some assistance in this area.
If you need a DVI primer then checkout:
http://en.wikipedia.org/wiki/Digital...rface#Overview
and:
http://www.playtool.com/pages/dvicompat/dvi.html
The second link has pictures of the various cable plugs and specific info. for ATI CATALIST driver users. ...very useful.
The DVI interface caries digital and analogue (VGA) signals to the monitor from the video card in the PC or MAC. To resolve which signals the video card sends to the monitor (analogue or digital) the video card requests an EDID from the monitor on the digital chanel. If there is no EDID returned the video card then the video card logic assumes the monitor is a TV.
The "no signal" problem with this TV/LCD in my case was due to my use of a VGA cable with a VGA to DVI adapter on the end. The VGA to DVI adapter cable has no digital channel for identifing the video mode EDID of the Philips TV/LCD and assumed it was a TV.
When I set up the catalist control center that the TV/LCD was an LCD monitor then the proper analog (VGA) signals were provided and the monitor worked fine.
Other DVI problems include:
~ using the improper cable. The DVI-D cable does not have the four pins that carry the analogue signals while the DVI-I cable has both the digital (SINGLE OR DUAL digital) AND ANALOGUE (vga) signals.
~ setting the video card resolution higher than the monitor.
My take home lesson was the DVI interface involves matching the cable, monitor, video card, video drivers and video driver setup to get good results.
rgs,
Kevin
I have a philips model: 15PF5120 showing a "No Signal" condition when connected to a PC using the DVI-I cable input.
No bad cap.s this time. All the electronics checked out 100%.
To understand the problem I had to understand DVI. Judging from the blog community, I am not the only one that needed some assistance in this area.
If you need a DVI primer then checkout:
http://en.wikipedia.org/wiki/Digital...rface#Overview
and:
http://www.playtool.com/pages/dvicompat/dvi.html
The second link has pictures of the various cable plugs and specific info. for ATI CATALIST driver users. ...very useful.
The DVI interface caries digital and analogue (VGA) signals to the monitor from the video card in the PC or MAC. To resolve which signals the video card sends to the monitor (analogue or digital) the video card requests an EDID from the monitor on the digital chanel. If there is no EDID returned the video card then the video card logic assumes the monitor is a TV.
The "no signal" problem with this TV/LCD in my case was due to my use of a VGA cable with a VGA to DVI adapter on the end. The VGA to DVI adapter cable has no digital channel for identifing the video mode EDID of the Philips TV/LCD and assumed it was a TV.
When I set up the catalist control center that the TV/LCD was an LCD monitor then the proper analog (VGA) signals were provided and the monitor worked fine.
Other DVI problems include:
~ using the improper cable. The DVI-D cable does not have the four pins that carry the analogue signals while the DVI-I cable has both the digital (SINGLE OR DUAL digital) AND ANALOGUE (vga) signals.
~ setting the video card resolution higher than the monitor.
My take home lesson was the DVI interface involves matching the cable, monitor, video card, video drivers and video driver setup to get good results.
rgs,
Kevin
But today, I’m making an exception here. Why? No idea. Perhaps only because the repair details are still “fresh” in my head… which is ironic, given this is a 16 year old monitor that hardly anyone will care about today. It is new to me, though. 
I picked it up last November from someone on my local Craigslist. It wasn’t very close to where I live, but was close to a family friend that I had to go visit anyways. So after watching the posting on Craigslist for a few weeks and seeing it getting...
