The 1520 would not turn on. No indicator lights at all. With fully charged battery and adaptor, with battery only, and with adaptor only. I replaced the mobo, and the system now powers up, but I get message on it's LCD screen: Invalid configuration - please boot to setup (F2) I get the same message after failing to reboot to setup (F2) It will not boot to PXE Boot either after using F12. I still get Invalid configuration. I have removed the system from the download server using the PXE Boot application , creating a new SDR record, making a new bar file, and running Stepmaker again. The Configuration Validator says that the configuration is good., but the 1520 reports the configuration to be Invalid. I have also used esc, and F1 thr F12 to no avail. I Replaced the keyboard with a known good one, so it is not a keyboard issue.
The 15290 is running Vista home premium. I looked at again saturday night, but forgot about steps 1, thru 4. I removed the HDD, and still get the same message, so I do not think it is an OS issue, unless Vista is embedding something in the firmware, or CMOS. Does Vista Do that? Will look at the 1520 Monday night.