Had the set almost 3 years. After 1-2 hours the screen goes
black. Something must heat up inside. Should the power supply go bad this soon? Maybe we do need a class action law suit. What does AKAI say about this problem?
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This is a problem that a repair shop must fix. One or two circuit boards must be replaced. Also several electrical connections must be resoldered because they have become loose.
I had the same condition happen to my set. My cost to fix the set amounted to about 350.00. I wish you luck.
Move the second button from the left to set, enter the time in 24 hour format via the HH and MM buttons, then move the button to start. The far left switch, on/auto.off is for the chime. Set to on for 24 hour alarms, set to auto for no chime from 11pm til 6am, set to off, to turn it off.
It sounds like one of the capacitators inside the monitor is malfunctioning, these little things store a certain amount of necessary power and then discharge it when it is needed. If it is malfunctioning, it could explain why it takes so long to charge, and why when you hit it, it suddenly comes on.
from what it sounds like Tom is that you have a heating problem. As soon as it warms up your monitor goes black. First I would Shut it down for a couple of hours. Unhook the power cord and let it completely cool down. Some monitors have a temperature breaker. When temp reaches a point higher than the set breaker it will shut off or power down. After I would say 2-3 hrs of cooling power it up and see what happens. If after a certian amount of time it does it again you have a over heat problem. If that happens again go to your favorite search engine and enter syncmaster 940mw support. Goto the manufactures web site and find your model. You may be able to find a solution to the over heat there. There is also a possibility there was a recall on that particular model for a overheat problem.
It soulds as of your solder joints are getting old and starting to crack. If the screen goes completely black then I would resolder all the major solder joints on the main PC board, and if you mean that the screen goes to all snow (as if the cable went out) then I would also pull the tuner and resolder the joints inside it too. If you do not have experience soldering on small PC boards then allow a qualified tech to handle it for you. The fact that it works sometimes means that all major components are fine and the repair shouldnt cost too much.