My laptop will not power on is something that happens quite often. The other problem is that the battery will not charge up. The no power problem can come from a few different sources. First it may be a problem with the ac adapter. The ac adapter is also known as the brick due to its shape. This the part that provides the power to the laptop.
The first thing to do is determine if the ac adapter is defective. You are going to need a digital multimeter.
You will place the red and black probes on the plug end that will plug into the laptop. Usually on the back of the ac adapter it will indicate what the voltage, current and wattage are. If it does not show the wattage it can be determined by multiplying the voltage times the current. I have found that sometimes the voltage may be intermittent. This is caused by a broken wire going to the plug end. While holding the probes to the plug move it around and watch the voltage. If it is good and then it drops there is a broken wire. This can be corrected buy purchasing a new plug end. You will need to know what the inner and outer dimensions of the plug are. You find the information on the back of the ac adapter or with specifications that came with the laptop. If check on the internet using the ac adapter model number.
If the ac adapter tests good, then the next problem may be the dc jack in the laptop. You can find various pictures of dc jacks on the internet. Check out videos of dc jack repair on youtube.
There are quite a few different types of dc jacks. They vary depending on the manufacturer and model of the laptop. There are dc jacks that solder directly to the motherboard. There are other dc jacks that are self contained and have a wire with a connector on one end that plugs in to the motherboard. The best way to find the dc jack is to go on the internet and search for the dc jack for your make and model of your laptop. When you find a reseller I would advise to check them out first by using resellerratings.com. at this link http://www.resellerratings.com/ . If you are using ebay or amazon check out the ratings for that seller. A couple of tests can be done to determine if the dc jack is defective. Try moving the plug a little while it is plugged into the laptop. Watch the power led on the laptop and see if it comes on and goes off with movement. If it does then the jack needs to be replaced. The other method is to dissemble the laptop far enough to get to the dc jack and measure to voltage at the pins going to the motherboard. You can try to go further in the circuit if you no exactly where to measure the voltage. Always be careful when taking laptops apart, because the plastic can be brittle and break easily. Batteries usually go bad when they have reached their life expectancy. This information is usually given by the manufacturer. Some batteries have to be installed to complete the circuit and if the battery is dead it may leave an open circuit. Sometimes you can measure the battery with a digital multimeter and some batteries have a button with leds to show how much power there is.
There are also ac adapters available know as universal ac adapters. They may auto select the output voltage for the laptop and provide the necessary current. There are other models that have a selector switch to choose the proper voltage. I have read good and bad reviews by using these. I have heard of no problems and then on the other hand I have heard where the laptop worked and then all of the sudden the motherboard was bad. My advise is to always go with the ac adapter that is for that particular model. The engineers designed that certain voltage and current for the particular circuit.
If the ac adapter and dc jack are ok ,then it can be a bad battery or the charging circuit on the motherboard may be defective. Try removing the battery and going right off the ac adapter
If all of these do not help and it is determined that the motherboard is defective it may be best to take the laptop to a professional. Most of the time it is not cost effective to replace the motherboard due to cost. Generally the cost of the motherboard and the labor involved exceeds the value of the laptop, unless it is fairly new and was an expensive model.
Thank You for reading and stay safe. All Comments are always welcomed.
No comments:
Post a Comment