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Re: monitor goes to sleep after 30 minutes vl1919
Welcome to FixYa! The default power saving feature is turning the monitor off. To change the settings go to the Desktop>Right click on it>Properties>Settings and you will see power saving settings where you can choose "Never turn off" or a longer time interval. These settings can also be found in your Control Panel for all of the Power Saving features for the computer, monitor and hard drive. Steve
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I have seen this happen on desktops where multiple monitors (or monitor and projector) are used.
As odd as it may seem, if you have a "sleep" button or a function key on your keyboard to put the computer to sleep... press that. Give the computer 30 seconds or so to actually go to sleep. Then press the Enter key to wake it back up.
Usually, upon wake-up the correct monitor will work.
I don't know why this works, and I suspect its only when a monitor or projector is plugged into the VGA port that it happens. Give it a try, no guarantees.
If you have any kind of secondary monitor or projector plugged into the VGA (or any other port, for that matter) try unplugging it before turning on your computer.
I am guessing the LED power indicator blinks green then becomes steady when the screen "turns on" (shows video). The problem is most likely a failing backlight power supply. That's why there is a 30 minute delay. Try to disable sleep mode and see whether that helps.
Hold down the power button on your monitor, with the power on, for approx. 25-30 seconds and the monitor will shut down for good. When you will start it again, wait at least an hour, the message will be gone and the monitor will work as intended.
Try looking for bad caps first, see example of failed PRINCETON monitors because of bad caps here: http://s807.photobucket.com/home/budm/allalbums
Post back what you see so we can guide you further.
The ticking sound is from power supply turning on and off.
I have a LCD panel it is connect to to the LCD. I need to change a setting on the computer to make it stop going into sleep mode, however, now that it's in sleep mode, how do I get out of that so I can make the change?
My VL1919 has been having this issue off and on for a month or so now. It happened three times in one day today, so I decided to do something about it. I opened up the monitor and poked around a bit.
I found three electrolytic capacitors on the backlight inverter board were bulging, two of which had just started to leak:
The capacitors were placed directly above and next to a large, flat metal heat sink. I say above with respect to the flow of air due to convection, and next to because the heat sink also wraps around, enclosing the group of capacitors on one side. The heat sink sits flush with the circuit board, turning the board into a front enclosing face. When reassembled, the metal housing sits a fraction of an inch above the sink, forming a back face. This assembly is at the top edge of the circuit board, so the housing then takes a 90° bend to form a top face. These capacitors seem to get almost no air flow... Together with the heat coming off the sink, it appears the engineers have created their own little capacitor oven.
Capacitors immediately adjacent to the affected components, but without blocked air flow looked completely normal. Looking at the traces on the circuit board and location of other components, the capacitors could have easily been moved out of the hot spot. This is either an act of gross negligence, or an intentionally created post-warranty failure point, designed to avoid market saturation. But that might be too pessimistic... "Never attribute to malice what can be adequately explained by incompetence."
Anyway, I scavenged a few capacitors off an old computer power supply to replace the damaged parts (one 470uF 25V two 1000uF 10V capacitor, both rated to 105°C). To avoid a repeat performance, I soldered some short extension wires to the replacement caps and moved them out to an open area of the board, being careful to give the high voltage components plenty of breathing room.
After reassembly, the monitor powered right up and came online. I guess the real question is how long it will stay this way.