Recent content by stud858

Seems as though the best available is a short few pages that's not any use for this problem. I recommend next step. Remove suspect mosfet. To remove- I oversolder each row of pins with heaps of leaded solder, then using two soldering irons sliding my irons around to melt everywhere. Then use...

Sounds like that mosfet is buggered then. now need to determine if a shorted part ahead of it made it go short. You'll be luck if that's the only issue. Possible though. If you are sure one side of mosfet is shorted to the other then it will need to be replaced. Switch leads to test short both...

That MOSFETS does look stressed. The only easy way to know for sure is a multimeter. See a YouTube video how to test. One side is 4 pins all shorted together. Otherwise is 3 pins shorted together. And then the 4th lonely gate pin. The 3 parts, gate, drain and source should not show short zero...

You could try looking under neath inside for the cmos battery. Take it out and short the plus and minus terminals. Make sure AC and battery are out of laptop first. Then put cmos battery back and try again.

I dont think dc jack has anything to do with your problem especially if you confirm inside the computer the pins on the mb show 19v OR the laptop works fine with battery removed. The battery power management chip recieves data from the battery. You will notice the battery dock has more than two...

I have a similar problem and am suspecting failure of battery management ic that selects between ac or bat for voltage in. And perhaps the current sense line for ac that is involved in the management. Im waiting on ic for change over to see if my sinilar problem is resolved. Sory not an easy fix.

Im waiting on battery power management ic to changeover. In the meantime.. bumpedy pump. Anyone?

There is a section on the motherboard that handles charging and discharging of battery controlled by a power management chip. Possibly it is faulty or parts around it. Take a look at schematic if you can download it. Unfortunately you need more than basic knowledge. "Electronics repair school "...

I'm troubleshooting a problem with a Toshiba L750. Intermittent shuts off (immediate power cut and reboot) , 10, 20 , 30 + minutes after successful bootup. If AC is disconnected, battery powered works fine for hours on end. It appears to be a problem with the AC supply and selection between...