I came across several of these Sony G500 21" crts. They had the g2 brightness problem. I fixed three of them using a special cable and windas program. A fourth one does nothing, and a fifth one has a broken power button. How hard is it to switch these power buttons and get one good monitor? I am already familiar with taking the back off. I am not sure if the front must come off to get to the switch, or if I must remove parts internally to get there. The broken button feels limp. The other button is good. While we are at it, if the fourth moniter does nothing at all when turned on,(no power light even) is there a fuse somewhere that needs replaced? Maybe that could be saved. I almost threw them all out, but I have fixed a few of them and they look great. A friend mentioned something about a charge, or a capasitor that can potentially kill you. Is there danger? The two monitors I need to work on have not been plugged in for more than 2 months. Thanks for your time!
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Re: Broken power button
Just take the PCB out of the unit, if its a mechanical switch just hit it and leave it on and reassemble, if its a push button switch just drill a hole next to the switch and use a non metalic object to turn the unit on :-)
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The second button from the left on the bottom corner by the power button is the brightness button. If you press it the brightness menu is pop up on the screen. With the menu up you just use the three buttons on the left to select the function and the increase or decrease the brightness and contrast on the monitor. BuddyMc
This problem is usually caused due to a faulty microswitch in the brightness button. To rectify this, you'll have to change this switch.
Get your monitor serviced by a qualified service personnel.
Hope this solves your problem. For more help or clarifications, please reply. Thanks.
Sometimes monitors, specially CRTs suffer from a certain condition, where the contrast and bright diminishes gradually this is indicative that the monitor is broken. If you want to increase the image clarity got to the graphics card control center. It should be on your task-bar. From there select monitor, image or color and adjust the slider: "gamma contrast to where you like". Note that this wont affect 3d applications or movies.If you want to change that as well theres another option for that too. This is works with ati, Nvidia, and intel's graphics cards, not sure about others.
The life expectancy is about 5 years. You can fix it, but it's not worth trying to track down the power board for a crt, it's going to cost you more than a new monitor. There are flat panels for under a hundred dollars now, you will save that on electricty over a two year period. Although some folks just like them better than lcd's that is no longer an issue, with the faster resolutions in the past few years you will be better off going for a new lcd. HP's website is the most likelly place to obtain service for your monitor, but I just got an email from Dell this morning and you can get a new 19 inch for about a hundred dollars from their reurbished shop if you really want to save some money, and a 24 was only around $200.
sometimes relay contacts get "sticky" from arc oxide corrosion whenever enough electricity is passed from metal to metal...in a perfect mechanical relay, the relay would be sealed in a vacuum. Try swapping relays to transfer the problem. If you can transfer it, you found the bad relay. I actually have disassembled relays and polished their contacts with great success.
The problem is with power inverter, usually the capacitors go bad and need to changed, they might be bulged and or leaking. Very cheap fix, less than a buck apiece and an hour with a solder iron. Google it to find more info.