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Re: On/off switch on zd7000 laptop
Verify that the case is firmly seated. If the plastic top is not seat correctly to the board, the mobo power button is not close enough to make contact with the button on the snap off panel, where the external plastic power button is.
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You may have a heat problem.
When the CPU overheats then it will shutdown (i.e. thermal overload) and won't boot up again until it has cooled down.If this is the problem is not fixed then the CPU will eventually fail. A faulty fan causes the problem or the fan and heat sink assembly are cloggedwith dust. Check the CPU fan to see if it spins freely, if not replace the fan.
If the fan and heat sink is clogged withdust the remove the dust and make sure the vents are clear and dust free. Use acan of compressed air to do this.
I just built/repaired one of these the other day. My son uses it now. Motherboards are notorious for going out. However you need to give more description to your problem. You just say it has issues but that doesnt really tell me anything. If you turn it on and get no beeps and no screen and everything seems dead except for the power light then it needs the system board replaced. But if you see the hard drive light running like normal with nothing on the screen then try it with an external monitor. If the external monitor works then the screen has died but the motherboard video card components are good. If you still got nothing then the board is bad and will need replaced. I'm sorry it is almost always bad news on these.
I have the same model with the same symptoms in for repair. This is a motherboard issue and requires a reflow of the GPU and chipset. It has nothing to do with the LCD because the buttons don't react when the laptop is "turned on". The touchpad turn on/off button does not react when pressed, the same is with the wifi, volume and mute buttons. The problem is in a poor solder and a cracked/oxidized contacts due to heat buildup.
Dismantled notebook thinking compressed air removed component or connection. Nothing. Reassembled most of notebook. Left battery and power disconnected for 6.5 hours, I later plugged only AC power into unit. Fans started spinning. Completed assemble of notebook and installed the battery. Blue lights returned. Problem seems to be the battery. Shorts out something and needs about 6 hours drain out. Works great now without battery, using AC power only. Ordered new battery.....