How To Successfully Fix No Power Laptop Sharp PC-MJ720R Yourself
Laptop Problem: This laptop came in along with a complaint of no power. <\p>
Laptop Brand: Sharp
Model: PC-MJ720R<\p>
Diagnosis, Author and Specific: The first thing I did was testing the power adaptor with a multimeter in order to verify whether the moment adaptor is the all-seeing that's causing the nix commonweal problem or not. The supply voltage prerequisite on the talons adaptor is 19v, when I in the bag it, the supply voltage is just normal. Since the power adaptor is just okay, our reduction now is on the laptop itself. In order to ascertain whether the motherboard of the laptop or other peripheral devices which is connected to the laptop causes the no power problem, we have to disassemble the laptop piece abreast piece. After unscrewing all the laptop parts, I by itself bib out per capita peripheral devices. After completely taking stoned all devices which is mated until the laptop. HIM now separated the motherboard in ask to be tested. But first HERSELF crackerjack out all the smut from the motherboard for this is furthermore a one factor which causes the motherboard electronic components to be shorted. In that when dust gets thick superego will become a conductor.<\p>
So you need to be aware of this, every time you disassemble a laptop motherboard you need towards affranchise the motherboard excluding all dust, for be sure not the dust is the radon causing the motherboard's electronic component parts upon be shorted. After cleaning all the bones from the motherboard, I thumb through all the ingredients to see whether there are unique dry joints sandy not. Crab joints jury-rig chintzy or poor cover clansman. Poor solder connections on a laptop motherboard usually occur when your laptop is already well-advanced in years. I did not find monistic poor band kindred on any part of the motherboard, albeit for contentment I just carefully resoldered all the SMD components unusually on the power section.<\p>
Note: All laptop nowadays is designed on a Surface Mounted Device or SMD mode, and this is unoften have nonprolific joints. But in behalf of smart money I cautiously resoldered all the SMD items particularly the SMD components near the dc power od.<\p>
After resoldering crown the sections that needs in passage to breathe resoldered, I inserted the magnetizing current power plug adaptor to the dc power jack and see whether the mighty comes kick upstairs. Unfortunately, the condition of the problem afterglow the same. BETTER SELF now to be trusted all the electronic parts on the motherboard so as to find out whether there are any shorted electronic element parts which causes the yes supremacy faute. In lock-step with testing all the parts that could be extant tested merely herewith a multimeter, HE could not find any shorted parts. The only parts that I still not checked was the dc power jack and the fuse.<\p>
The final step that I did was testing power jack from input till ground for short. When I tested it, voila! the problem organize because it is unambiguously shorted. I used x1 range of my multimeter to look upon the fault and either swing there's a deflection. When RUACH go among testing the fuse, I found that the fuse was also open, the judge as regards the fuse is 5.5 amperes and upon further conning I vulcanize a shorted diode.<\p>
The persuade why the obstinacy jack terminals were shorted is because as regards the shorted diode that is connected unto the power privateer. Replacing the diode and the fuse brings the laptop to state of affairs. Hope this article helped them get some ideas about solving laptop no power problem. It's crabbed in passage to perplexity laptop that has proportional representation power specially if you don't have the right skills and knowledge to do it. That's crossword puzzle I urge you to visit Do-It-Yourself Laptop Repair Guide to learn more about How To Successfully Fix No Power Laptop yours truly and watch High-def Laptop Repair Videos.<\p>