Question about Dell UltraSharp 1800FP 18.1" LCD Flat Panel Monitor

1 Answer

Analog Dead/DVI OK

I've been running two computers off of the 1800FP for some time (one on the analog side, the other using the DVI input - I toggle between the two with the front panel switch). Suddenly, the analog side stopped working. I've tried:
1) a brand new VGA cable
2) hooking up a different computer

There is a very faint glow on a black screen when I activate the analog side. The computer hooked up to analog can detect the presence of the monitor, and system preferences can be selected, but the display remains black. The DVI side works just fine.


Posted by on

  • gregbor Dec 28, 2008

    I have a Dell S2409W monitor that blinks on and off intermittently using the DVI cable. VGA works okay. another samsung 22" monitor does the same thing. When moved to another computer with a different video card it works okay. I am using an INTEL mother board with on board video and running windows VISTA home premium. HELP!



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 472 Answers

Sounds like the video controller board inside the monitor has blown a transistor. They are only about 3mm wide so not easy to spot even if you look closely.

It's a fairly rare fault, though not unknown to happen without reason.

Posted on Apr 08, 2008


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

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.

Nov 18, 2013 | Belinea 1930 S1 Monitor

1 Answer

Hdmi will not work only use of component cables will.


The HDMI[1] input on your TV receives digital audio

and uncompressed digital video and audio from an

HDMI device or uncompressed digital video from a

DVI[2] device.

This input is designed to accept HDCP[3] program

material in digital form from EIA/CEA-861/861B-

compliant[4] consumer electronic devices (such as a settop

box or DVD player with HDMI or DVI output).

The HDMI input is designed for best performance

with 1080i high-definition video signals, but will also
accept and display 480i, 480p, and 720p signals.

To connect an HDMI device, you will need:

• one HDMI cable (type A connector)

For proper operation, it is recommended that you use

a short HDMI cable. You should not encounter

difficulty if you use an HDMI cable shorter than 16.4

ft (5m).

HDMI cable transfers both video and audio.

Separate analog audio cables are not required (see

illustration below). Some CDVs (video CDs) may

not output digital audio signals. In that case, you

may hear sound by connecting analog audio cables.

However, if you connect analog audio cables with

this connection, the HDMI terminal on the TV will

not receive the HDMI digital audio signal and you
will hear analog audio only.

To ensure that the HDMI or DVI device is reset

properly, it is recommended that you follow

these procedures:

• When turning on your electronic components,

turn on the TV first, and then the HDMI or

DVI device.

• When turning off your electronic components,

turn off the HDMI or DVI device first, and
then the TV.

To connect a DVI device, you will need:

• one HDMI-to-DVI adapter cable

(HDMI type A connector)

For proper operation, the length of an HDMI-to-

DVI adapter cable should not exceed 9.8 ft (3m).

The recommended length is 6.6 ft (2m).
• one pair of standard analog audio cables

Dec 16, 2010 | Toshiba 30HF84 30" TV

2 Answers

Samsung syncmaster 2033sw monitor, till now i was using a vga cable for the display, but recently i bought a dvi cable and connected it. but its not detecting the display of dvi cable. if i remove the vga...

LCD Monitors having multiple inputs have option and option to select and switch between the displays from analog (VGA) or Digital (DVI) inputs. Go to the LCD menu and select input source (DVI)

Hope this helps!


Nov 15, 2010 | Samsung Syncmaster 2033SW Monitor

1 Answer

My monitor is an Acer 20". model # X203H I am using a MSI MEGA computer which has a VGA connection. My Acer monitor has two connections aVGA and DVI , I am using the VGA connection from the ACER Monitor...

There is both an analog and digital setting on your monitor settings. Bring up the monitor settings and toggle between the digital and analog settings until you get a signal.

Sep 13, 2010 | Acer Computers & Internet

1 Answer

Monitor wont come out of sleep mode

I'm guessing you are using a the VGA input of this monitor (the smaller "D" shaped connector with 15 pins) on the back. If not, and you are using the DVI input (larger white connector), then check your PC video output. I've seen this occur with HP monitors when they accidentally get set to "digital" input. Its easy to set that way (even by mistake), but not as easy to reset to analog (VGA). To do that, you'll need to find someone with a DVI output on their video card. Once you connect to a DVI source, the monitir will come on and stay on. You then need to go into the menues of the monitor, find the setting and change it back to "analog". After you do of course, you won't get an image on your monitor until you reconnect to an "analog" (VGA) source.

Jun 02, 2010 | HP w1907 LCD Monitor

1 Answer

VGA connection works, DVI does not

Everything seems perfectly normal...

When you connect the computer to the monitor via an analog VGA cable, you get signal on the analog input.
When you connect them via a DVI cable, you feed the monitor's DIGITAL input, so the monitor doesn't get any signal on it's analog input, and informs you about it.
You have to select the digital input from the monitor's On Screen Menu, and then start the computer up - you should see the picture OK.
Also remember to set the display resolution on your computer to match the optimum (native) resolution of your monitor - this will give you optimum picture quality. In case of VA712B it will be 1280x1024.
Good luck and please come back with a testimonial if helped.

Jan 24, 2010 | XFX GeForce4 Mx440 (64 MB) Graphic Card

1 Answer

My viewsonic mo9nitor says analog not digital on

To clarify, you know that analog is referring to the VGA 15 pin video input, and digital is referring to the DVI video input, right? You can't have the digital video unless you use the DVI input, which requires a DVI output from your computer (and a DVI cord of course).
If you already knew this and you mean that it won't switch over to your DVI, then there could be several problems. Most of them being with your DVI signal source (computer). Try booting the PC with ONLY the DVI cord attached between the PC and the monitor. If you have a VGA cord plugged into either, UNPLUG IT FROM BOTH ENDS.

Dec 05, 2009 | ViewSonic Computers & Internet

1 Answer

Monitor not working with converter

You have to make sure the DVI output of your computer supports analog video.

Check online for a DVI pinout. You will see the group of 4 or so pins to one side of the connector provide analog VGA. If your Video card (or cable) doesn't utilize those pins, then your monitor isn't going to be supplied the signal it needs.



Nov 18, 2008 | Computers & Internet

1 Answer

Use of HDI-V input on PPM42M5SBx

the answer is no as VGA is a analog connection whereas the DVI connection is digital just like HDMI.
A DVI input on your display wont understand the analog signal and vise versa, hope this helps

Jun 17, 2008 | Samsung PPM42S3 42 in. Plasma Television

1 Answer

I was tring to Connect Two Computers to One Monitor, but i didnt get it, does someone know how to do so? I bought a KVM switch, USB to use between a new Acer running Win XP and old Dell with Win 98. Could...

I guessing that since **-one responded you've given up and returned the whole mess but what the hey.

A lot depends on the KVM you're using. There are some high end units that will match different sources to the monitor but most work best with matched input and output. Unless you's specifically states that it will convert analog to digital it won't. So if it's an analog KVM then both the computer video boards need to have an analog VGA jack and the monitor does too. If the KVM is ditital you need to have all the systems and monitor digital. Savi? The Monitor may support boath analog and digital input but NOT at the same time. You can't plug in two computers at the same time, that's what the KVM is for.

The bottom line here is that you typically need to run the least common de**minator to use a KVM. Also, if the computers have different frequency (resolution) out put and you hit the KVM switch then the monitor will freak out. Some monitors will auto-switch between frequencies but most don't (especially the cheapies).

There are adapters that will down convert digital to analog. If you're dead set on using the KVM with that old Dell then you may need to plug the down converter into the Acer Video Board but you'll loose the high resolution and sharp picture from the digital video. If it was me and I had to use the KVM, I'd get a cheap digital video card for the Dell or just run two monitors.

I run 5 systems on my desk, Three of which are older servers with analog video. They share an analog KVM with video and keyboard on the wall. The other two systems are current generation and share a KVM and 27" flat panel center desk. I also have a laptop that hangs on the other wall with a laser blue tooth keyboard on the other side of my desk. Now if my wife would only let me turn part of her craft studio into a server room.....

Feb 14, 2008 | AOC 19LVWK LCD Monitor

Not finding what you are looking for?
Dell UltraSharp 1800FP 18.1" LCD Flat Panel Monitor Logo

183 people viewed this question

Ask a Question

Usually answered in minutes!

Top Dell Computers & Internet Experts

Les Dickinson
Les Dickinson

Level 3 Expert

18417 Answers

Alun Cox

Level 3 Expert

2678 Answers

Doctor PC
Doctor PC

Level 3 Expert

7733 Answers

Are you a Dell Computer and Internet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides