Panasonic TUCTH100 crashed. cannot switch on

you may need a driver to use the HDMI port .Does it display using an RGB (desktop computer display) cable? My Panasonic had a computer display input

Here's a nice tool to decipher BSOD errors. If you can get into Windows it will grab all your C:\Windows\MiniDump files and display them for you to see what the root cause of the BSOD was.
If you got this while installing Windows on a machine, what age is the machine and what version of Windows is it?
The A5 error seems to be related to your BIOS not supporting the OS that is being installed. If the machine was a Windows ME desktop and you're putting WinXP on it, then you either have to update/flash the BIOS, or the machine is too old to use the power management features of the new OS and is crashing trying to figure out how to use them.

There should be 2 switch actuators sticking up underneath of the toner cartridge, maybe you knocked one off?

your best bet is to go buy another one... for the cost of the display you could actually get a second hand machine that works better...

I’m happy to assist further over the phone at https://www.6ya.com/expert/norman_d2fa496dce30c65d

It sounds like there may be an adjustment that needs to be made on your PC for your graphics card. Check your Display Properties\Adanced settings and see if there is anything that needs to be switched If you are using a laptop then you may just need to switch between your primary display and an external display.

Try this first

Open up the doc feeder
unplug the power cord
hold down the pointed switch behind the small glass strip while plugging the power cord in

close the doc feeder
scroll down to SHIPMENT SET
press SET
press 2 for no
wait for machine to intialize.

if this doesn't work you have a bad LCD display.

You assume correctly. Open the device manager to see which drivers you need exactly. You can find them at Panasonic's support site. The link below will take you directly to it. If there are any you can't find here, then try driverguide.com. You will have to register with driver guide, but it's free.
https://eww.pavc.panasonic.co.jp/pc/cgi-bin/itn/toughbook/dl01.cgi

Your problem seems to point to your video card. Your video card needs a driver to function. Odds are good that you need to install a video card. Avoid using the built-in Windows driver. A new video card has a CD with it. Use that. With your driver installed, configure your display settings. The Display applet on the Control Panel is your next step. The Display applet provides a convenient central location for all of your display settings. Go there and make your setting using the tabs.
You can crash Windows and force a reinstall simply by installing a new video card and not uninstalling the old card's drivers. Always uninstall the old card's drivers before you install drivers for a new card.

You need to install the correct video driver let me give you the download site along with other downloads to make sure you have everything.

http://h10025.www1.hp.com/ewfrf/wc/softwareList?os=228&lc=en&cc=us&dlc=en&product=214330&lang=en

you need to install the first one on that list

You might want to check the refresh rate in your advanced settings under display properites. Under Windows it shouls be something like: Start Button > Settings > Control Panel > Display Then click on the Settings tab, and on that screen click Advanced On that screen, click on the Adapter tab. At that point, make sure the adapter listed matches yours, and refresh rate should probably set to adapter default. Hope that helps.