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Re: Dell Monitor comes on but no picture
The monitor isn't getting a signal from the computer, which is why the power indicator goes orange. There are two possibilities:
1) The computer isn't operating correctly. It may not be starting up at all when you turn it on, and you have a "no boot" problem to solve, or
2) The computer is working properly, shows all the signs of normal startup (hard drive activity, Windows startup sound from speakers, etc.). but video isn't reaching the monitor. There may be a problem with the video card (or on the system board if it's integrated video). Or the monitor itself is bad and not detecting the video. You can test this by connectng a known good monitor.
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I disagree with ikkenom only due to the symptom of the flashing blue light. This would indicate to me that the monitor is not getting any display signal and is in sleep mode at least the is what happens on my Samsung monitor. Used to be that they use a two color led in the monitor, green when ON and getting display signal and amber or orange when in sleep mode. I would check the computer by trying a different monitor. If you have a second monitor, great, if not, maybe a friend will let you bring your computer over and try the computer with their monitor. Could also be a display adapter setting. Do you get any change when you first turn on your computer? i.e. Do you get the BIOS or manufacturer screen when first turned on? Also if you disconnect the monitor cable from the computer and power cycle the monitor, do you get a No Signal display for a few seconds before the monitor goes black and the blue light starts flashing?
Let me know what happens with the testing above or if you need further instructions to carry out testing.
If this monitor (HP w1907) is going into sleep mode the normally blue power led will change to yellow. This indicates loss of video signal or possible out of range resolution. If the picture goes dark and the power lite stays blue, you have a backlight malfunction. It can be an inverter power fault but this model mostly has worn out backlights causing a shutdown condition. Monitor Mike
Flashing power light often means the monitor isn't getting a signal. When you turn the monitor off and back on, do you see the viewsonic logo for a few seconds? Try plugging it into a different computer to see if it comes on.
If plugging it into another computer doesn't work, it may be a bad power circuit in the monitor. A common problem with monitors is the capacitors going bad. If you're handy with a soldering iron, you can try replacing them yourself. Look here for pictures and instructions: Fix an LCD Monitor
First--was it working? Did it suddenly stop? When you see the LG logo, then it goes away, does the power light turn from green to amber? Sounds like that doesn't happen. So--if you are getting a signal, you should see something. If there is no signal, then the power light should change from green to orange. With no lights at all, I suspect a faulty monitor.
There are 4 c5707/5706 in the inverter transformer driving circuits, the cause of the problem was due to poor solder connection in the bias circuits of the transistors. Make sure to check that after you install the new transistors otherwise you will blowthem up. Common problem with this model. When the circuit drwas too much power from the power supply, it will shut itself off to ptotect itself.
If the power light dims or changes color after the no signal message comes up, that means the monitor went to sleep. While the monitor is plugged in and on and the computer is also on, Try unplugging the VGA cable from the monitor. wait 30 seconds and then plug it back in o see if the power button light comes back to normal color and the screen flashes on. If not, then the monitor is not getting a signal from the computer. If using a desktop computer,Try a different cord or try the monitor on another computer. If using a laptop, you need to activate the laptop to use an external monitor. That can be done through the display settings, OR, most laptops have a shortcut key feature which usually involves pushing the Fn key and one of the F keys at the same time. The F key may say CRT/lcd or have a picture of a monitor and a screen. If the power light does light back up and still no picture, There may be an internal issue on the monitor
your monitor is beleiving it is not receiving any signal from your pc. 1 make sure your cables are secure. 2 make sure your pc is on. 3 borrow a monitor from a freind to see if your pc is sending the signal out, if the borrowewed monitor is showing a picture, hook yours back up. 4 if still not picture your mpcb or video pcb in the monitor is bad.
We have a dis-assebly and repair guide posted on our web site at: www.ccl-la.com/monitor_repair.htm The problem is usually the driver transistors, our guide shows where they are and what to replace to get your monitor back running again.
The part where you see some color bars and blinking green led is what we call MONITOR SELF TEST. A diagnostic pattern consisting of four colors (red, green, blue and white) appears, and the LED flashes slowly. this happens when signal cable from the monitor is disconnected from the tower and leaving the power chord for the monitor plugged in. If the monitor works properly on a different computer. then its a problem with the computer's video card sending out signal. im 85% sure that its a problem with your video card.