₦airaland Forum

Laptop name: HP 840 G1

Problem: laptop trip off instantly when you press the power button or insert charger.

Solution: Kbc_pwr_on, not coming from Sio. It absence leads to the tripping off. Then I check the DC/DC section.
After observing the schematic, I detected the fault and correct the abnormalities.

System now working perfectly.

#fyp

Laptop name: HP 820 G2
Problem: No power, dead condition.

Solution: Discovered the DCIN section is not switching. Grabbed my multimeter and through this I realize there's a shorting.
I injected voltage on the main power rail and got the culprit that caused the short.

Add one: changed the faulty components and I clean the water caused corrosion.
System now working perfectly.


I'm Magraw the technician ✍️

Laptop Name: Dell vostro 3550

Fault: Dell laptop Not powering up solution

Solution: Got this Dell without any sign of life. after checking the voltage rail, 19v and the power section is active.
I checked the power switch and 3.3v is present on its pin.
I then resort to flashing the bios file. After reprogramming the bios, Boom 💥, the system responded and it's now working.

Have you got a faulty laptop?[color=#006600][/color]

Laptop name: HP Z book Firefly 14 G7
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‎Problem: System not powering on - Dead
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‎Solution: Inserted charger and I detected that the DCIN section is not working at all. I then start to troubleshoot the system in order to get the problem resolved but all to no avail.
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‎After a while, I walk through the schematic and I discovered the system is using an ISL charging IC, with new generation DCIN architecture.
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‎Grabbed my multimeter and I start reading the DCIN section. During this process, I discovered that the first two mosfet get voltage but the gate is not active.
‎I then substitute to reading the charging IC pin, instantly, I detected that the charging Volt-in pin 19 isn't working. After some examination, discovered a shorted caps replaced it and problem was solved.
Magraw, the technician.

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