HP G6 LAPTOP Reverse Current Problem

HP G6 LAPTOP Reverse Current Problem

📌 Product: – HP G6 ( M/B PN– R33)
🤔 Problem: –Dead and 19V Short.
🛠 Faulty Product : –Motherboard.
🔍 💊💉 Diagnosis & Solutions: –Check and found 19V short or Reverse current  adopter LED off after connecting with Laptop. So open the motherboard and check for 19V Short. Remove main Fuse/CLR and inject 3V 0.998Am form DC Power Supply found one pf cap is short so replace this with working one check again injecting voltage found no short. so re-fix the CLR.  Think that work is done but after connecting Adopter found DC Jack LED not glow and 19V not in CLR .

 

So again start checking no CLR impedance is ok so no short in 19V line ,started reverse checking and found second mosfet   gate not tiger. This gate is control by Charging IC directly trough a register found this register is ok so now the problem in ic.

 Started checking IC requirements to start and 1st test point found problem that ic not getting VCC 19V. Check and found one register is open replace this register. 19V get by the ic and it drive the second mosfet gate so CLR get 19V and board get life. Problem resolved.

 

 

 

 

 

 

WhatsApp chat