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On all Panasonic Toughbook Models,
if the unit will not turn on try the following:
Step 1: Unplug the unit.
Step 2: Take OUT the Battery Pack.
Step 3: Plug-in the unit.
Step 4: Turn On the unit.
The battery pack acts like a giant capacitor and can
prevent the unit to turn on, especially when the unit
was previously used on battery pack and was allowed
to fully discharge to below 5%.
When the unit is turned on WITHOUT a battery pack,
then a single Green light should show on the front
edge of the unit when the cover is open facing you.
When the unit is plugged in WITH a battery pack,
then you should see a yellow, orange or green light
which shows the battery is charging. When the unit is
turned back on, then you should see two (2) lights,
one green and the other yellow, orange or green.
If the unit is plugged back in and either with the battery
in or out you see no lights whatsoever, then chances are
that something is wrong with your AC Adapter/Power Supply.
Richard - Montreal Based
Panasonic Toughbook Authorized Dealer since 1989.
Thanks for your detailed information. But solution is very simple. The compressor contactor in out door unit. Struck. And hence, when you power on, without indoor commanding, the out door starts running.
Replace same type Contactor relay (In out door unit) immediately. Hope, it's helpful.
There could be one or more problems with your notebook, a black screen could be a system board problem. Does the power light come on? If so turn unit off and unplug it, remove the battery and plug the power supply into the unit. Turn unit on. If the unit turns on it is a battery problem. If it doesn't power on then turn unit off and reinstall the battery and turn the unit, if you unit has a vga port on the side hook a monitor up to it and see if you get output. If you don't it is probably a system board problem.
your contactor that supplies power to the compressor has its contacts welded together and even if you turn up the thermostat and the coil that holds the contacts closed will de-energize,but with the contacts welded together this is no longer possible,you need to replace the contactor
The Mitsubishi units have to be reset by turning off the indoor units by switching the remote or thermostat to off. Then turn off the breaker to the outside unit(s). After 30 seconds,turn on the breaker and then you can turn on the remote for cool. If no lights come on on the inside units, most likely you have blown a fuse soldered on the main PC board. At this point, call your technician. A goos tech will be able to wire in an in-line fuse holder so if it should happen again, you can easily replace the fuse.
If you do see a light or two come on at the indoor unit but the outdoor unit does not start after 3 or 4 minutes, sounds like you will need to call a technician. Most likely you have a blown fuse on the main PC board of the outside unit. It is not an easy one to replace.
You have a bad speaker on this unit or the audio output circuit is in need of repair. Try to disconnect all of the speakers and then turn on the unit. If it still stays in protect, you will need to have this unit serviced, unless you understand how these solid state circuits work. If the unit does come on without the speakers, turn off the unit and add one speaker at a time until the unit will not turn on. Disconnect that speaker and have it checked out or have the wiring checked out. Good Luck