Old HP laptop will not turn on. Power cord comes on and goes off. Power button turns on for 3 sec. then turns off. Power cord was working yesterday, but decided not to work today.
my hp laptop will not turn on
Are you on battery or AC? Any lights on the laptop at all? If you are on AC power, there is generally some LED indicator that power is good.
Did you checked whether your motherboard is shot or not ?
Did you cleaned the laptop parts like RAM,fans from dust.
Does the light on the power supply (the "adaptor") go on? Do you get ANY response from the laptop when you press the on/off button?
reset cmos battery
Hello, there could be several reasons for this to happen. Have you checked if laptop powers ok when using battery? If it does, that rules out problem with laptop and focuses on charger/power supply.
You can start at the basics by connecting laptop to a different electric outlet. Are the cables in good condition? Are there any parts not covered by insulation or frayed? If possible get a new cable known to work and check. When you connect the charger to laptop, does the cable fit ok?
Another possibility is the charger itself. Do you have access to another charger? If not, can you get one? Try using a different charger and check if it works.
Another possibility is that power supply connector is loose/broken. Depending on the laptop, power supply connectors are just attached to motherboard by a cable, or they are soldered to motherboard. If power supply is just attached by cable, the only thing holding it in place is plastic, which might break easily. If power supply connector is soldered to motherboard, wire connection might have broken or it is starting to break. It might also be loose. Solution for this, would be to open laptop and check. If needed, change it.
I must say, it all leads to problems with power supply, especially if when connecting charger it shows and then disappears. Sometimes, over heating processor can cause this too. What happens when you move the wire a little bit?
I had a friend with a similar problem a few months ago. We determined that it was the power adapter in the case that had lost contact with the board. Does your plug-in have much play in it? If so, the component might have broken loose from the solder and just needs to be re-soldered. Either way, with the intermittent symptoms, I would first look to power supply circuit. Hope this helps.