HP Pavilion 505n shuts down and won't turn on after trying to use card reader..

[darjoy]

I plugged in a Targus Universal 33-in-1 card reader/writer with a microSDHC card from my LG cell phone camera to upload pictures and the computer continues to shut down, even though I have removed the reader. Does not stay on long enough for the icons to appear.  Continually shuts down.   

[ImnoGuru]

Hello darjoy and welcome to the computerhope forum.

Have you tried to start your computer using the "F8" key.
F8 is the key you use to start a computer in safe mode.

Just in case you are not familiar with the process:
Start your computer from the off position and tap the F8 key during the start up procedure.

During the loading of Windows at some point it should change to a screen giving you several options.
One of the options is to "Start computer in safe mode."
Select this option using your up/down arrow keys and press enter.

If that is successful you can explore your options to do a system restore if needed.