Forwarded from Rangoon Computers
🔒Lockdown Case Study🔒
💥Today Received Apple A1466 Mac book Board no: 820-00165-A💻
💥Problem: 1. Charging Led Glow orange, didn't change to green if we charge up to 4 / 5 hours (Fig1)
💥Problem: 2. Some times powering on & some times not powering on
💥Solution: Opened and cleaned the motherboard
💥First i check for any physical Damage - No Physical Damage Found
💥Second i check for any corrosion - i found corrosion near Charging ic (Fig2)
💥i cleaned the corrosion and check for any short in that PF - PF Found Shorted (Fig3)
💥i Just Opened and check in Board View and Schematic if that PF is necessary (Fig 4)
💥Yes That PF is Necessary because it Connected to boot strap pin of Charging IC (Fig5)
💥Replaced that Pf and applied UV Solder mask to rusted pcb area (Fig6)
💥Now connect the charger and checked for powering on - mac powered on and display came
💥Assembled the laptop and charged for up to 4 hrs , Now led turned to green (Fig7)
💥Now powered on the laptop , it's powered on and gives Display - Laptop Working fine. (Fig8)
💥Thanks Rafi sir for Teach us how to read schematics and understand the sections how to Repair Them🙏
💥Today Received Apple A1466 Mac book Board no: 820-00165-A💻
💥Problem: 1. Charging Led Glow orange, didn't change to green if we charge up to 4 / 5 hours (Fig1)
💥Problem: 2. Some times powering on & some times not powering on
💥Solution: Opened and cleaned the motherboard
💥First i check for any physical Damage - No Physical Damage Found
💥Second i check for any corrosion - i found corrosion near Charging ic (Fig2)
💥i cleaned the corrosion and check for any short in that PF - PF Found Shorted (Fig3)
💥i Just Opened and check in Board View and Schematic if that PF is necessary (Fig 4)
💥Yes That PF is Necessary because it Connected to boot strap pin of Charging IC (Fig5)
💥Replaced that Pf and applied UV Solder mask to rusted pcb area (Fig6)
💥Now connect the charger and checked for powering on - mac powered on and display came
💥Assembled the laptop and charged for up to 4 hrs , Now led turned to green (Fig7)
💥Now powered on the laptop , it's powered on and gives Display - Laptop Working fine. (Fig8)
💥Thanks Rafi sir for Teach us how to read schematics and understand the sections how to Repair Them🙏
Forwarded from AJAY
💥LAPTOP DELL 3558 MOTHERBOARD WISTRON 14216-1💥
Forwarded from AJAY
💥FIRST CHECKED USB PORTS FOR ANY SHORTS -NO PROBLEM FOUND💥
Forwarded from AJAY
💥REMOVED KEYBOARD,BATTERY ,TOUCH PAD THEN TRIED SAME SYMTOM FOUND💥