How are you lovely person. I really enjoy your videos. You are going to be very popular on TH-cam if you keep up your excellent work. I love you very much ❤.
(4:55) Vgate = 0.5V? On an input power Mosfet? Baffling. Not even in our educational practices with common and cheap Mosfets. Typical Vgate values for school practices were [1.0 - 2.5], a typical value was 1.5V. SI7121DN data sheet for Vgate in a normal application should be in its data sheet (we must check) and even measure Rgate and other passive components on the gate terminal of that suspect Mosfet before replacing it. Another way to put it, in my personal opinion, every other area or circuit section of that motherboard works. All the best.
Hi Carlos. Unfortunately I have found with a number of laptops that were labelled as "faulty", it has been difficult to find out what the actual fault is, as many of them boot fine. With this particular laptop, it powers on fine (in spite of low gate voltage on SI7121DN), and does not power off even when left on for long periods of time. There is a second input on this laptop which uses the same SI7121DN and the gate voltage on that is 3V, which sounds closer to what the gate voltage should be. I actually swapped the SI7121DNs, but the gate voltage was still 0.5V, so no issue with the MOSFET.
@@therepairshare673 Understood. I would keep it (not as a donor to that motherboard) for comparison when I receive a similar model (Dell Inspiron 5370 here in North America). Thanks for your response. Greetings from Mexico.
Great video. Thanks alot man 👏
Great video thanks you!!!
How are you lovely person. I really enjoy your videos. You are going to be very popular on TH-cam if you keep up your excellent work. I love you very much ❤.
❤🎉
(4:55) Vgate = 0.5V? On an input power Mosfet? Baffling. Not even in our educational practices with common and cheap Mosfets. Typical Vgate values for school practices were [1.0 - 2.5], a typical value was 1.5V.
SI7121DN data sheet for Vgate in a normal application should be in its data sheet (we must check) and even measure Rgate and other passive components on the gate terminal of that suspect Mosfet before replacing it. Another way to put it, in my personal opinion, every other area or circuit section of that motherboard works. All the best.
Hi Carlos. Unfortunately I have found with a number of laptops that were labelled as "faulty", it has been difficult to find out what the actual fault is, as many of them boot fine. With this particular laptop, it powers on fine (in spite of low gate voltage on SI7121DN), and does not power off even when left on for long periods of time.
There is a second input on this laptop which uses the same SI7121DN and the gate voltage on that is 3V, which sounds closer to what the gate voltage should be. I actually swapped the SI7121DNs, but the gate voltage was still 0.5V, so no issue with the MOSFET.
@@therepairshare673 Understood. I would keep it (not as a donor to that motherboard) for comparison when I receive a similar model (Dell Inspiron 5370 here in North America). Thanks for your response. Greetings from Mexico.