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Dr. Einstein

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Note: karamihan sa thema ng mga post ko ay hindi para sa mga totally zero knowledged sa laptop. Ito ay intended as a reference post later on in the future para sa mga technician na nakapag umpisa ng mag aral ng tamang laptop repair ☝️☝️☝️ if you want me to be one of your educators, enroll and reserve your slot sa PINOY TECHNICIAN ACADEMY.



Brand: Acer

Model: Swift 3

Board Code: GH4UZ LA_141P

Issue: No Power Dahil Nabasa

Action Taken:



1. Dahil nabasa siya, laging mauuna ang basic ng inspection. Physical observation, tignan kong may corossion. In my case, wala akong nakitang corrosion.



2. Instead na corrosion, nakita ko n as ginalaw na ng ibang tech ung board at my hindi binalik na piyesa. Pag mga ganung cases ang maencounter niyo, pweding maging clue pra sa solution. "Note: not all the time. In my case, kaya natanggalan ng mosfet kasi si previous tech, medio my hint xia na doon ang sira kaso hindi niya abot maybe. With my tester, nakita ko sa linya na yun na may nag exist na short. Pinagpatuloy ko at un nga, nakita ko ung short.



3. Gamit ang boardview, schematic, and proper voltage injection, na pinpoint ko na ang dahilan ng short circuit ay isa sa mga mosfet sa helera ng cpu section. "SHORTED DUAL CHANNEL N MOSFET" MOSFET PQZ5. BASICALLY, PINALITAN KO. "Kong paano magcheck ng shorted na mosfet, maraming tutorial sa youtube...



4. AFTER ng step 3 ko, double check ng short circuit via diode and resistance mode. so wala na, then saka ko sinaksak ang charger.



5. Voltage check. Cheneck ko na lahat ng standby voltages and basic testpoints like pin 8 ng bios, voltage ng switch. Nothing is wrong.



6. Pressed power button and boomed.. ☝️☝️☝️ Unit is revived. Walang nangyaring hula hula method...
 

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