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The 9-pin port on your PC tower is NOT a video port, it is a serial data port. All VGA connectors are 15-pin. Hooking up to the 9-pin port will not get you a picture. There should be a VGA port on the PC, or else a DVI an/or HDMI port. You can get DVI-to-VGA adapters that work, but only if the DVI port is an analog DVI, not if it is a digital DVI (DVI-D or DVI-DD).
The manual won't help you to much in this regard. This monitor is a standard type that has both a VGA and DVI input. Normally what you would use with a personal computer.
If you want to use it as a TV monitor you will have some sort of device that outputs to VGA or DVI. DVI stands for "Digital Visual Interface" and it's preferable over VGA as it should potentially give you a better image.
This means: A) A computer. You can build your own media TV and watch internet streamed shows like Hulu, Netfix, use as a DVD player, etc. I recommend this route. No more dependance on Cable companies! You just need internet. B) Find a DVD, and, or Tuner/Cable/Satellite box that has these outputs. If you want to use Cable or Satellite, contact your provider company and see if they have a box that will output to either VGA or DVI. Might have a hard time finding one of these, or it might cost more then it's worth. C) Buy a S-Video input to VGA/DVI output. You can buy these for around $40. Then you should be able to hook it up to just about any device as most modern TV devices will have an S-Video outputs.
You will not benefit from the DVI input unless you have DVI output on your computer. The great advantage of DVI is that the picture is transferred in digital form all the way from your computer to the individual pixels on the monitor. If you only have VGA output on your computer then you will never get a better picture than by using a good quality VGA cable to link that to the VGA input on your monitor.
The DVI plug is designed to carry both digital and analogue (VGA) signals on the various pins, so "adaptors" exist to allow a VGA monitor to attach to a DVI output on a computer. Monitors may also support VGA input from their corresponding DVI input sockets, but the picture quality will never be better than by using a good VGA cable because it is still not using the digital capability of the DVI interface. What's more, because you may need more adaptors and thinner conductors in the cable, you will probably achieve a marginally poorer picture than with VGA to VGA.
When you next buy a PC or a new video card, get one with DVI to take advantage of your new monitor. In the meantime, your best bet is a quality VGA to VGA link.
Sorry that's not what you were wanting to hear, but I hope it will help you avoid further frustration.
What is the way to get the very best picture quality when hooking up my new HP L 1755 Flat Screen Monitor to my E-Machine W3052 which is about 3 years old.First would it be compatible or the best idea to hook up VGA to VGA.DVI to DVI which means buying a new Video card for my Computer so the DVI could be hooked up to my computer, or hook up the DVI to VGA Connector ? Would a DVI Video card be worth the extra costs if I went that route ?This HP L 1755 only has a response time of 25 ms, is that good enough to watch Music Videos or not ? I do not do any gaming.Can you tell me the best detailed step by step way to hook up this monitor to my E-Machine W3052 Computer and which Connector to use ? If I need a DVI Card what would be the Part number or Card I would need to get ? Sorry about all the questions.Any guidance and input would be greatly appreciated since I have a disability and need some help and to be honest I do not have 50.00 for a DVI Video card. Sincerely & God Bless ! Thanks,Diehard16
Contacted viewsonic about this issue- they suggested- have both dvi and vga hooked up to same machine. start with poweroff on both. power on monitor, then power on computer. when you see display coming from the vga, power off pc, then disconnect vga cable, turn off power to monitor, disconnect power cord from monitor for 5 + seconds, reconnect power cord, power on monitor, then power on pc.
If this doesn't work to get the dvi working, (as happened to us) we returned our monitor for a replacement, since it was still under warranty.