Hi all! I have an HP laptop that when googled says it shipped with a 120w charger, during a move that charger been lost but I have a 65w Dell charger which fits and appears to power everything on.. The HDD spins up and the CD drive laser makes the usual noises, fans spin, keyboard lights etc but the display does not come on. Not even a flash of bios screen or anything. The same result when I remove the HDD. Is this a product of using the lower wattage charger? Or should I not waste my money buying a new one? Thank you!!