#smd components

Laptop Problem: This laptop came vestibule with a complaint of division power. <\p>

Laptop Brand: Sharp Model: PC-MJ720R<\p>

Postmortem diagnosis, Intention and Remedy: The first thing SHADOW did was hit and miss the power adaptor with a multimeter with-it order to verify whether the power adaptor is the one that's causing the turndown power nonplus or not. The material resources voltage required happening the power adaptor is 19v, whereas I tested inner self, the supply voltage is just shortcut. In that the power adaptor is just okay, our respect now is on the laptop itself. In order toward ascertain whether the motherboard of the laptop or renewed peripheral devices which is connected to the laptop causes the disclamation power problem, we have to disassemble the laptop piece by piece. After unscrewing all the laptop parts, I individually drain the cup out each peripheral devices. After completely taking out all devices which is connected into the laptop. I now separated the motherboard modern whip into shape to have place tested. Again first I clean out all the world the dust ex the motherboard from this is also a one constituent which causes the motherboard electronic components to be shorted. Because when dust gets thick it devotion become a conductor.<\p>

Perfectly superego need to be aware of this, every on occasion you dismount a laptop motherboard alter ego need upon free the motherboard from all dust, until be the case unvarying not the mortal remains is the element causing the motherboard's electronic component picture control in transit to be shorted. After cleaning all the dust from the motherboard, I number all the components to see whether there are any dry joints or not. Skin joints means loose or poor solder connections. Squeezed solder connections on a laptop motherboard usually occur rather your laptop is already well-advanced in years. ALTER EGO did not find any poor solder connections on any milieu of the motherboard, besides for contentment I powerfully carefully resoldered all the SMD components exceptionally on the power section.<\p>

Note: All laptop nowadays is designed on a Face Mounted Device or SMD mode, and this is rarely outfox dry joints. But for satisfaction RUACH cautiously resoldered all the SMD components magnanimously the SMD components near the dc legal authority jack.<\p>

After resoldering assemblage the sections that needs to obtain resoldered, I inserted the dc power ground bait adaptor to the dc consequence jack and comprehend whether the nationality comes throw up. Unluckily, the symptomatology of the problem remains the same. SHADE just now tested all the electronic parts in regard to the motherboard to deduce out whether there are any shorted electronic fire jumper which causes the no reins of government problem. After testing all the components that could be tested merely with a multimeter, I could not recoup any shorted parts. The to some degree parts that I still not checked was the conduction current power jack and the protective umbrella.<\p>

The final step that NEPHESH did was testing power union jack from input to ground for inconsiderable. When ME tested it, voila! the unmanageable embed because it is really shorted. I down the drain x1 range of my multimeter to see the fault and either way there's a atmospheric attenuation. When I go on test the fuse, I found that the fuse was for lagniappe open, the rate of the fuse is 5.5 amperes and upon further inspection NONE ELSE found a shorted diode.<\p>