It also might happen because of a bad HDD controller on the system board, but it’s not common. When you see “no bootable hard drive found” during laptop start up, it usually means that the HDD is dead or it’s empty and an operating system is not found. Make sure that you put correct screws into correct holes. If you can boot the basic system, start assembling it back and test after each step. You already replaced the CPU, so it would be either the system board or the memory. If it still will not boot up, then one of three components is bad. You’ll have to remove the power switch board from the top cover or carefully connect it to the system board without removing, it’s up to you. Assemble everything together outside the laptop base, connect an external monitor and turn it on. For a basic system you’ll need the system board, the CPU with cooling module and the memory module. When I have a weird laptop problem and cannot figure out what is wrong, I take it completely apart and assemble a basic system outside the laptop box, right on my bench. That’s would be nice if you can find a test memory for a while. First of all, try to reseat the memory module/modules.
#Laptop turns off when unplugged how to#
You’ve replaced the CPU in this model, so I assume you know how to take it apart. How to troubleshoot and fix laptop video problems That was my first experience when improperly plugged video cable prevented entire system from booting. The laptop started perfectly fine as soon as I plugged the video cable back in place. The video cable was half-way out from the connector on the back of the LCD screen.
Bingo!!! I wasn’t very surprised, but I was very happy. The next logical step would be opening up the LCD display assembly and check if all connectors are seated properly. Now I know that the problem is somewhere inside the display assembly (of course, if the video connector on the system board is fine). I unplugged the video cable from the system board and the laptop started fine again with the external monitor. So, the only part that I added before it failed was the LCD screen assembly. The laptop failed to boot again with the same symptoms. After I assembled everything back, one more surprise was waiting for me. Just in case I restarted it 3-4 times and each time I got video on the screen. I opened up the laptop case, removed the LCD screen assembly and reseated the video card and… Surprise, surprise, the laptop started fine with an external monitor attached. Nothing helped to start the laptop normally. I tried to power it on for a few times with the same result.įirst of all I tried simple stuff: remove the battery and start the laptop with AC adapter plugged in, reseat and swap the memory module, remove the hard drive, the DVD drive, the wireless card. After I pushed on the power button, fans started spinning and were active for a few seconds and laptop just turned itself off. If your battery is not user-servicable, you will have to bring the device to an authorized technician to determine why it is not holding a charge.I plugged the AC adapter and tried to turn on the laptop.
Important: Many laptops and tablets do not have removable batteries.
Then you can have a technician check if the problem is with the battery or the laptop itself before buying a new battery. If your computer stopped holding a charge unexpectedly, it may be worth bringing your computer into a repair center.You can either buy a replacement from the laptop manufacturer or buy a third party battery that matches the exact specifications of the original battery. If your battery's charge was getting pretty short before it died, the best choice is to simply buy a new battery.What to do when your laptop doesn't hold a charge However, this is unlikely since the power supply (which is located outside most laptops in the charger) will take the brunt of the power surge, protecting the laptop itself. Additionally, a power surge could affect the components that connect to the battery. This can happen for the same reasons the battery itself might get damaged. While most batteries are pretty rugged, extreme heat or cold, contact with liquid, or a sharp jolt from bumping or dropping your laptop may damage the battery.Īnother possibility is that the battery connector inside your laptop is damaged. This can happen if there is a short in the internal components of the battery. In rare cases, laptop batteries will simply stop working out of the blue. Most likely, your battery reached the end of its useful life and stopped holding a charge. Answer: If your laptop turns off immediately when you unplug it from a power source, it means your battery is not working.
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