HP EliteBook 8470p truning on then off - Page 1
Forum section: electronics / general

author: sony mavica
author_rank: Frequent Contributor
timestamp: August 16, 2015, 04:23:02 am
content: hi my HP EliteBook 8470p laptop was working used it for about 2hrs then i shut it down and went out shopping just came home about and hr ago and turned it on it powers on then i can hear the fan then like 5sec latter it turns off nothing shows on the screenlooking on google with no luckcan anybody help

author: sony mavica
author_rank: Frequent Contributor
timestamp: August 16, 2015, 08:28:05 am
content: anybody can help i need for work tomorrow

author: sanchaz12
author_rank: Regular Contributor
timestamp: August 16, 2015, 08:56:35 am
content: Have you tried removing the battery, then powering it from the mains? Or else you could try the opposite, no mains connected and try to power it from the battery alone. Hope that may help.

author: sony mavica
author_rank: Frequent Contributor
timestamp: August 16, 2015, 09:12:33 am
content: i try now

author: sony mavica
author_rank: Frequent Contributor
timestamp: August 16, 2015, 09:55:56 am
content: still the same

author: sanchaz12
author_rank: Regular Contributor
timestamp: August 16, 2015, 12:33:45 pm
content: Another thing to watch while powering on the laptop is to look at the power/hard drive/charging leds. Are they on solid? Or are some of them blinking? (hard drive led may blink randomly, but if it stays on the whole time it may indicate a problem). Also you could try to hold the power button when it's off until it turns on again and back off, then release it. If not already done, unplug all other cables such as USB devices, display cables etc.Otherwise it may be a defect in your power brick or a component is malfunctioning.

author: wraper
author_rank: Unknown
timestamp: August 16, 2015, 12:39:45 pm
content: Quote from: sony mavica on August 16, 2015, 08:28:05 amIf you are very lucky, only bios got corrupted. But most likely something died on the motherboard. As of only thing i can think which could bring it back until tomorrow, is trying to remove the 3V battery from the motherboard to reset cmos settings, but don't think this will help.Check if power supply is outputting voltage, otherwise if it is dead, it could be that battery is discharged and notebook shuts down immediately after power up.

author: TheAmmoniacal
author_rank: Unknown
timestamp: August 16, 2015, 12:47:25 pm
content: Remove the battery and power plug and hold the on/off button in for 30-60 seconds. Put both back into it and turn it on.

author: Aodhan145
author_rank: Frequent Contributor
timestamp: August 16, 2015, 02:02:00 pm
content: Quote from: TheAmmoniacal on August 16, 2015, 12:47:25 pmBeat me to it. I always do this with my Probook 4530s.

author: G7PSK
author_rank: Super Contributor
timestamp: August 16, 2015, 03:55:28 pm
content: Check the fan for dust and fluff, I had similar with a Dell some time ago turned out the cooling pipe fins were blocked with debris and a feather.Turned on but overheated before boot up even finished.

author: sony mavica
author_rank: Frequent Contributor
timestamp: August 17, 2015, 01:05:40 am
content: thanks will give some of these ideas a goalso power brick works fine have tested in my sisters laptop she has the same one as me