This guide, Laptop Motherboard Failure Analysis Matrix , presents a failure-analysis table that links common laptop motherboard problem areas (subsystems) to the components most likely to fail and their typical causes. Here is a cross-checking combi…
Some charging faults are obvious. A shorted MOSFET, an open fuse, a damaged DC jack. This HP 14-dy0505 was none of those. What initially appeared to be a failed charger IC evolved into a complex power sequencing fault where a collapsed internal bias…
Previously I wrote about the various mosfets like FDV301N MOSFET and SI7121DN MOSFET used in the power supply part of the dell laptop. I am writing this note on NPCE885PA0DX IC which is I/O controller chip that I found is used in my dell inspi…
Yesterday I wrote a bit about the DC power jack power supply circuit of the Dell Inspiron laptop which I want to repair. Today I want to write another note on the power supply schematic diagram because I haven't completely looked at the compone…
