Question about Sony gdm20d11 Monitor
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Posted on Jan 02, 2017
Blond and Baffled, (CD), it's okay, I believe you have a common problem.
The computer sends a video signal to the monitor. The monitor is working fine. Hence - No Signal.
Monitor doesn't receive a video signal within a certain specified amount of time, it goes to a Power Save feature.
Just enough power is used, to keep certain components inside the monitor at a ready state. (When it gets a signal from the computer, the monitor turns back on)
The problem is the computer.
Most of the computers that come to my shop have failed because the inside of the computer, and it's power supply have never been cleaned, or VERY rarely.
[Plus one more problem, stated at the end of this solution]
It's understandable, as a computer repair shop charges a slightly hefty price to do this, (Not myself),
and it looks like a daunting task to most computer users.
The computer is unplugged from power, computer case is opened, and a can of compressed air for computers, is used to spray out the inside of the computer.
(Power supply also)
As dirt, dust, hair, carpet deodorizer, (And other material foreign to the inside of a computer), build up inside the computer, this is what transpires:
A) The cooling fan, and heatsink for the Processor, become clogged with the above mentioned foreign material.
(This is an example of an average Fan and Heatsink,
You can click on the images in the different views, to enlarge them)
In the link above the item that has many fins on it, is the Heatsink. The Heatsink sits under the fan.
The Heatsink functions like a radiator. The fins draw heat away from the Processor. (Processor not shown. The Heatsink is mounted to the top of Processor's case)
The fan draws air through those fins, which in turn draws the heat away from the Processor.
When the area in-between the fins is clogged with foreign material, plus the fan's blades, the cooling capacity drops tremendously.
This in turn allows the Processor to heat up.
The Processor has a certain thermal limit, and turns off when it becomes too hot.
It is a Fail Safe feature that is built-in. Keeps the Processor from burning up.
No processor running, no computer. Hence a No Signal to the monitor.
Solution 1, is to buy a can of compressed air for computers, unplug the computer from power, open the computer case, and clean the inside of the computer. (Also the power supply)
Should you like directions in how to do this properly, and if you need advice of how to open your computer case, please state so in a comment. (Believe top right of your page)
B) There is one more thing that transpires on a large percentage.
The Power Supply overheats also.
When the cooling fan of the Power Supply becomes caked with the above foreign material, it heats up. As the power supply heats up, tries to put out more power.
Heat = Wasted Energy
Also, there are Heatsinks inside the power supply that become clogged)
Eventually, the power supply components inside the power supply, fail.
Solution 2 is to replace the power supply.
If Solution 1 does not fix the problem, then I advise it's time to try Solution 2.
Should you need guidance to do this task, please reply in a comment.
(Tip: Once you rate a solution, you can no longer post a comment)
This link, states the specifications of the Sony Vaio RB30 Desktop PC,
Posted on Jan 08, 2010
Its easy to repair. Some parts that needs replacement are the blown and bulge capacitor in the power supply section on the monitor. They are the very first to be affected when something goes wrong. The others where the inverter transformer and the inverter light. Very cheap to repair, the labor is the one that cost that much. Bring it to a nearer technician in your area and it will be repair in no time
Posted on Jul 09, 2010
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