Display settings and 2nd monitor not working

Hi everyone, I have a tx2510 and Samsung 24 inch monitor. I have been using the Samsung as my monitor for months now with no issues. I went away with my laptop for a week and came back yesterday, hooked the analog monitor cable in, used it last night, eveything was fine, put it on hibernate and went to bed. This morning when I turned it back on, I got a floating Check Signal Cable box on the Samsung and no image at all on the notebook's screen. There is nothing wrong with the cable, connections were snug, it hadn't been touched since last night.
If I unplug the cable from the notebook, I do get an image pop back up on the notebook screen. So I went into Display Settings to see what was what and became more confused. The Samsung is listed as the #1 monitor, yet when I click the Identify Monitors box, the #1 shows on my notebook screen? And instead of 1920 by 1200, 1280 by 800 is shown as the max res. The "This is my main monitor" and "Extend the monitor onto this desktop" options are both grayed out.
#2 monitor is initially grayed but if I select it, it reads as "Default Monitor" with a max res of 800 by 600. Natural res for the tx2510 screen is 1280 by 800. If I select #2 and apply, it confirms, and then when I go back in to Display Settings, it's back to #1 (Samsung, even though the only image I can get is on the notebook's screen).
It's hard to troubleshoot this issue because as soon as I plug the monitor cable in, my notebook goes black and I have nothing to work with.
It's probably something simple but I really have no idea what to do next, drivers are current, I tried restarting, unplugged the battery, replugging the monitor cable. I need my 24" screen back!!! Any ideas appreciated...

Disconnect all the peripherals and the battery and press and hold the power button for 20 secs... start the notebook and connect the samsung monitor... press Fn+F4 keys to cycle the display.....
||-Although I am working on behalf of HP, I am speaking for myself and not for HP.-||
//Click on Kudos if my reply was helpful and answered your question//
||-If my answer solved the problem please mark the topic as the accepted solution-||

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Display settings and 2nd monitor not working

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