|Blank as in the screen is all white, or all black (no video at all)? |
If it's black, people often say they have no video when they actually DO always have video while booting the computer BEFORE Windows is supposed to load, but no video after that.
Do you always have video while booting the computer BEFORE Windows is supposed to load,
or no video at all ?
"I have tried to connect an external monitor and power up as usual, but still nothing/blank screen."
You will get no video in any case when there is no ram installed.
Some laptops will display on an external monitor without you having to do anything.
If you get no video on an external monitor, some laptops have a key combo that you must press to toggle the display to external video only / built in display video only / sometimes both - see the Owner's or User's manual for the model (e.g. press both Fn and Fx ; x is a number).
If that doesn't work either, something inside the laptop is probably damaged
"If I press a little hard on either side of the button it acts as if I were jsut pressing the button itself. "
The power button presses on a momentary switch - it's on only when the power button is pressed in. If the power button sticks such that the switch is on continuously, the computer will shut off in a short time, if there is nothing wrong with the switch. Pressing near the power button should not make it act as if the power button was pressed.
It's extremely rare for the power switch itself on desktop computers to physically fail, but that does sometimes happen with the power switch on a laptop.
Ask the owner.....
Have you, or is it possible someone else who had access to this computer...
- dropped it, or dropped anything on it, or otherwise exposed it to a physical jolt ?
- spilled liquid on it, or sprayed it with liquid, or exposed it to liquid such as rain ?
Since the video last worked properly all the time, has there been a power failure event that happened while the AC adapter was plugged in ?
Those things are the most frequent reasons something inside the laptop has been damaged.
Depending on settings in the bios, pressing the power button briefly while Windows is running may place the computer and the video video in Standby or Hibernate mode
You can have problems with the software on the hard drive that results in the computer not "waking up" from that mode.
However, holding the power button in until the computer shuts off releases the computer and Windows from that state - the computer SHOULD always have video while booting the computer at least BEFORE software loads from the hard drive.
If the user normally has to Logon to Windows, then it would be NORMAL for the hard drive activity led to stop blinking shortly after Windows reaches that point and the user has not responded. That led SHOULD blink while booting the computer BEFORE that point, assuming that the bios Boot Order or similar settings have not been messed with.
A poor connection of the ram in it's slots CAN cause your symptoms. You could try re-seating it. It is extremely RARE for ram that worked fine in the same mboard previously to spontaneously go "BAD". There's probably absolutely nothing wrong with it.
A problem with the software on the hard drive, or a defective hard drive, CANNOT cause no video while booting the computer BEFORE the software is supposed to load from the hard drive.
A problem that is causing problems with charging the main battery, or a defective main battery, can cause your symptoms when the computer is running on the battery alone. In that case, if there's nothing else wrong, and if there's nothing wrong with the AC to DC adapter and it's connection to the laptop, the computer should work fine when the main battery is removed and the AC to DC adapter is connected to it.
Laptop no video (or video problems), and battery, AC adapter, power jack T shooting.
See response 1: