I had power issues with my laptop (HP Pavilion dv7 1040ef) for awhile (two dead accumutators, some shutdowns for no reason), but now my computer won't load anymore. I can still start it on accumutators, but it will probably run out of power in a few minutes).
When I unplugged the AC adapter while the battery was in and then replugged it, it often kept running, then shut down an hour later.
There is a LED (on the computer, next to the cable) that should glow when charging, but plugging the AC adapter does not make it glow. It sometimes blinks once when I unplug the cable.
If I unplug the AC adapter from the wall, its LED (on the adapter) keeps glowing for a while, suggesting computer does not even draw power from it.
It has already happen several time, but I managed to get through with trying different (random) procedures (none of them worked twice!) like unplugging everything and pressing the power button 15 seconds, or pressing the power button about 10 or 20 times in a few seconds. But now I don't find any way to make it boot.
I wanted to disassemble the computer in order to find if there is a burnt component I could replace, but according to what I understand of the manual, it is very complicated and risky; and hardware is not my cup of tea.
Do you have any idea of what I could do to fix this? (Before I buy a new laptop)
Answer
It sounds like your laptop's power jack may be damaged, so that the connector isn't making proper contact to provide power. (The blink of the LED when you unplug the connector is especially suggestive. Try wiggling the connector while it's plugged into the laptop and see if there is any position in which the LED stays on.)
Replacing a power jack is fairly easy as laptop fixes go. That said, if you're not comfortable taking apart a laptop, I don't recommend trying to do it; it is slow, exacting work with little or no margin for error. Take the computer to a professional for repair, or simply replace it.
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