I've been having a frustrating problem with my Laptop, but I didn't bother to fix it until it has gotten worse recently. When I press the power button to turn on the computer if it's shut down or put on sleep, it doesn't power up immediately. Sometimes it works as soon as I touch the power button, but in other times, I keep pushing the power button down for a few minutes until it powers up.
I don't know if it's a problem with the power button itself or with something else. Could it be something related to the power supply? I have this long dead battery that can't keep the computer working for more than 5-10 minutes if the power cord isn't connected. However, I tried to disconnect the battery to see if the laptop would power up immediately if it's receiving power from the power supply directly, but nothing changed and the problem is still persistent. What do you suggest to fix the problem?