First check the AC adapter is working proper if the power light is on. Use multi-meter, check the voltage. Some of the oldest notebook models have an internal transformer, so the power (110-240 V AC) goes directly into the laptop body. Even the oldest models usually have a power good status light. If you have positive power status and the notepad simply won’t turn on, the next check the battery.
Press the power button few seconds. If the power light continues to flash, disconnect the AC adapter and then remove the battery. You need to wait for several minutes after reconnect the AC adapter and press the power button. If the laptop works, shutdown and disconnect the AC adapter, install the battery, and reconnect the adapter. If the power light flashes but the laptop does not turn on, you may have a defective battery.
If you’re not using the notebook for a long time (more than a month), charge the battery and remove it from the notebook. Store the notebook and battery in a cool, dry place. Leaving a battery in a notebook for extended periods when it is not used can damage the battery.
Video Display Problems:
If you can always hear your laptop fan when you turn on the laptop and now you can’t it’s not a video failure, it’s a power or mainboard failure. The next step is to connect an external monitor with a standard VGA connector, whether a CRT or an LCD. If your notepad won’t light up the external monitor, it’s extremely likely that either the motherboard or the internal video adapter (if it’s not part of the mainboard) has failed.
If the external monitor display is fine, then you have a problem with the Laptop LCD screen or the LCD cable connection. If the external monitor image is the same as on the Laptop LCD, then it is likely to be a faulty integrated onboard video, this means replacing the motherboard of the Laptop.
Laptop and Notebook Overheating:
Laptop overheating has become a more common problem, there are many factors involved such as processor type, cooling system such as fans or heatsink, ventilation, the initial heat given off by the CPU, even items such as video cards can increase the laptop heat as a whole.
A few simple steps below we can help to stop laptop overheating to a large degree.
Most laptops overheat because the fan intake is blocked either from placing the laptop on a soft surface or by dust. In either case you will need to let it cool down before turning it back on (may take up to 30min). If you suspect that dust is blocking the fan /heatsink, get a compressed air can and try to clean it now (that will cool down the laptop too).
Next, you can clean the exhaust port by sucking out air with a vacuum cleaner. The exhaust port usually sits on the side of the laptop. It’s the opening that blows out hot air. The intake grills are small openings that allow air to be sucked into the laptop by the revolving fans. They can sit on the sides or at the bottom of your notebook. To clear the intake grills, spray them with canned air.
Finally, you can apply fresh thermal grease to the interface between the CPU and its heat sink. Again, please consult the laptop’s manual or manufacturer to obtain instructions on how to disassemble these components.
Always place your laptop on a hard surface. Never place your laptop on blankets, comforters or other soft surfaces that can block fans and air vents.
Turn off your computer before placing it into a briefcase or a backpack. If you need to not turn it off, place it into hibernation to avoid any processes that generate heat. Do not ever place an operating laptop in a confined space where heat can build up.
Install monitoring software such as SpeedFan that allows you to watch and track the temperatures of processors, hard drives and other components.