My V5535 will not power up. It died the other day as battery was not charging. Have tried it without the battery, holding the power button down for 10 seconds and then plugging in the external power. There is 20v dc power from the adapter and the fan and the leds initially work but then it all dies after a few seconds. I replaced the AC adapter 4 or 5 weeks ago as the same problem occurred then and this cured it (coincidence?). Any ideas welocme please.