Power it up again and this time, tap the Function 8 key until you see the Advanced Boot menu with Safe Mode as the top option. Scroll down to "Disable automatic restart on system failure" and you will then see a blue screen with the Stop Error message telling you what went wrong.
Post back here with the numeric code 0x0000?? and ANY_WORDS_JOINED_UP by underscores and someone will be able to help - possibly even me.