Question about Canon Office Equipment & Supplies
No sign of life at all when power button pressed
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: fujitsu laptop
This seems to be a common problem. Remove and reseat the memory modules. If that doesn't do it, remove the hard drive and all but one memory module and try to bring it up. If this works, add the other memory module and see if the whole thing doesn't come up. If not, get back to me for more ideas.
Posted on Nov 26, 2007
A microwave can be dead for many reasons.
It may be the fuse, which is usually located on the floor of the oven behind the control panel or between the door switches.
If the fuse is good, it may be an open thermostat or thermal cutout (TCO) / thermal fuse on or near the magnetron or on top of the cavity / body of the oven.
If it goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the magnetron thermostat to open.
Then when it cools, it closes the circuit and allows power through again.
When checking thermostats, if it has a hood fan thermostat, that should read open, as opposed to the others, which should read closed.
If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.
If it went dead a few seconds after pressing the Start pad, that's usually a failing high-voltage transformer.
If it goes dead or blows the breaker (or GFI) when you plug it in or open or close the door, then there's a problem with a door switch or door switch mount.
If it's intermittent or random, it may be a bad connection, usually on the control board or a loose fuse holder, or even an intermittent fuse.
You should do a continuity test on the fuse while it's in the holder (with the microwave unplugged, of course) then turn the fuse by hand or take it out and put it back in, then test it again.
If you remove the fuse, then press the meter leads against the ends, it can allow internal contact to be made and make a bad fuse appear to be good.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on Aug 03, 2008
Give the door a firm push shut (even if it appears shut already). There is a safety mechanism that stops the door opening when drum is turning and it gets its knickers in a twist sometimes. Happened to me twice in the last 5 years and can never remember how to fix so end up ringing Miele support who are always helpful. Next time I'll look here first!
Posted on Nov 05, 2008
SOURCE: Jamo Sub300. No power. No lights
Well it would void the warrantee, but you can take the back panel off and the power supply will only have two leads (3 if grounded) in from the plug, and out to the crossover. It sounds as if you are correct that the power supply is bad.
Posted on Jan 05, 2009
SOURCE: CP685AVR/BF685 Power Contro.
It is likely the battery. These batteries are designed to last 3-6 years in a UPS. The good news is that if it is the battery, it is completely user replaceable and you'll have a Cyber Power unit that works just like new with a new battery. What may have happened is that the battery was weak, and you may have had a slight dip in the AC power. This caused the Cyberpower unit to switch over to the weak battery which couldn't handle the load. The unit then turned off. When you press the "ON" button, the unit will go through a self-test that checks all of the components and the unit will not turn on and be functional unless all of the components come back with a PASS, including the battery. If possible, test the battery with a voltmeter, it should read around 13.5, but not lower than 11.5v DC. However, with the unit over 3 years old, it almost certainly the battery. Here's a link to a replacement battery for the CP685AVR: http://www.batteryinternational.com/cyber-power-cp685avr-ups-battery-ups-batteries-f1.html
Hope this helps.
Posted on Jul 01, 2009
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