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I turned all the power off to go on holiday. turned poweer on when i got home but the printer will not turn on

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Possible that the power supply of the printer is faulty so check the SMPS with these tips:

Posted on Sep 30, 2010


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I cant figure out how to turn on the canon mf5770

First make sure its not plugged into an outlet surge protector. Most canon products keep the power button on the keypad. They are also sometimes on the backside of the printer usually near the power plug.

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Have a Happy and Safe Holiday Season...

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Is this a power cut off or a blank. If poweer is not present then the supply voltage to the circuits must be studied and rectified.
however if the volages arre present then it can be failure of the display processor/drives.

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My tv will not turn on the green poweer light comes on then goes out


Power supply board just die.It can be dead at anytimes.Tries websites, to buy a refurbish power supply board for the replacement.

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Aug 16, 2010 | Philips Televison & Video

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Pioneer A-509R amplifier: whenever I try to use it, the standby function cuts in and I cannot turn standby off. Your advice would be much appreciated! Thanks!

It is possible that your amplifier is cutting off the power due to a protection in the system. The output or power circuit could have a fault that trips off the protection circuit to worrk. now this is ttricky and might need a lot of power board electronics experience as the fault needs to be traced . You can disconnect the poweer drivers and see if the poweer come on. If so the drivers must be chacked for short and replaced. Check also the speakers for any short and disconnect and check. hope you try. Good day

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Since a recent power failure the printer will not turn on.

It is possible that the power supply in the printer has failed. You will need to open the power supply unit whichcis within the printer. Open the panels and get acess to the power supply which is a SMPS- switch mode poweer supply. Start from the fuse, the surge protector which could be short or the mains rectifier, mains capaccitor or the SM driver. Replace and proceed.Check for short inthe secondary side for fusible resisistors opening, for diode shorting or zener shorting. Also check for the optocoupler which feedsback the switch. Use a good multimeter to check. If you are not familiar ask a friend with electonics knowledge to help. However if you visibly notice a fault of a burnout replace and proceed. hope this helps. Good day

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At times pc wont turn off with mouse windows shuts down but computer will turn off and on again immed

Try draining the power of the computer first. completely shut it down by pressing poweer button for like 5-7 sec. then unplug power supply from the outlet. then press and hold power button for another 15-20 sec. After that, plug back in the power cord, and turn computer on normally.

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My sony Vaio will not turn on, i tried removing the battery but still it will not boot up

Did you try to do a POWER DRAIN
1. Remove the power supply and Battary
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1 Answer

Does not fully poweer up

I had the same problem. You might try the keyboard on good fresh high quality batteries. If this solves the problem, buy another ac power adapter. Good luck!!

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