A few weeks ago, the display on my wife's Ti400 started acting strange--flashing lines, blipping out, turning white. I seem to have eliminated all possibilities other than a bad (or loose) inverter board. My next move will be to open up the hinges and check the connections, but in the event that I need a new inverter board, what are the options? I saw that pbparts.com has them, but are there any other sources?