I have an HP 8460p. Only on battery power sometimes the display goes gray with horizontal lines. On AC power the problem goes away.

I worry about the age of this machine. BE AWARE that similar models, refurb are selling at the near 200USD price point so parts and repair is unlikely. Just get another that is working is my advice.

http://computers.woot.com/forums/viewpost.aspx?postid=7152497&ref=cnt_odet_tc_jtd was such a deal and I bought 2 for the office here.

Here's what looks to be your exact model for 220USD. http://www.officedepot.com/a/products/372068/HP-EliteBook-8460p-Refurbished-Laptop-14/

Shop counter fees here start at 150USD so my advice is to replace it if canned air cleaning or an OS reload doesn't clear it up.

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