computer crashing making a buzzing noise

[anthony soeder]

my hp 6730 b laptop charger was beeping and eventually stopped working i replaced it with a loaner ..The loaner is a original hp charger but has less power volts are .5 off but the original had 90 watts the loaner has only 65 watts...it charges the bat to 100 percent..although i noticed the lightning bolt led is not staying blue like it was...it goes to amber at 60 percent charge and then blue like itshould somewere working up to full charge then it goes off..it used to stay blue.. i dont leave it plugged in at night..i figure i better not..NOW 3 DAYS LATER MY LAPTOP CRASHED TWICE AND BUZZED... NO SCREEN ...FAN GOING AND LEDS BLINKING...it would not shut down from power off on button....so i umplugged the charger and pulled the batt out...put batt back in and it said windows did nor shut down correctly..hit enter and it rebooted fine....how serious is underpowering a devise...in general i always thought under was ok within reason over was bad....??? im buying the original 90 watt hp block today.....cant risk it did i damage any thing...???

 

[James7679]

That all depends. If you are not using the laptop while the "under powered" charger is plugged in, the battery will just take longer to charge. BUT, if you are using the laptop while the charger is plugged in, you could very easily do some serious damage to the laptop. The charger is meant to supply a certain amount of voltage at a certain load. If you are drawing more from the charger, more than it is meant to put out, you can fry the charger resulting in a short circuit and subsequently fry your motherboard.

Best thing to do is not use it anymore until you get either the OEM charger or a direct replacement from a company like Targus. Targus USA | Cases, Bags and Accessories for Laptops and Tablets

After you get the new charger, if you are still having problems, you will likely need to bring your laptop to a tech who can bench it and test the MoBo. Hope everything works out for you.

 

[writhziden]

Ah, I see you have two threads with the same problem started... I replied to the other. For the sake of the forum, I will ask the other one be deleted since you received very sound advice in this one.