How to Use multimeter DIODE MODE to find ANY motherboard fault.
Why Electrical Engineering Stack Exchange recommends it
Electronics Stack Exchange users cite it as the standard example of the diode-mode board repair technique when they ask how it works and whether it is sound practice.
Recommended by 1 people across 1 different months, 2018 to 2022.
What it is
A long live-stream by microsoldering repairer Jessa Jones of iPad Rehab showing how to use a multimeter's diode mode on unpowered boards to find faults, by probing suspect points and comparing readings with a known good board. She works through a real motherboard repair, which she says ended with the image coming back shortly after the stream.
What people said
Recommends Nick Gammon · 2018-04 · Electrical Engineering Stack Exchange · on “Using diode mode on my multimeter to debug circuits. A good idea?”
I've seen a few YouTube videos where the presenter, who appears to be experienced in board repair of Apple (and presumably other) circuit boards recommends to use your multimeter in "diode mode" to make measurements from a suspected problematic part of a circuit, and compare to a known good board. The boards are not powered during the measurement. How to Use multimeter DIODE MODE to find ANY motherboard fault [this video] - Jessa Jones Importance of DIODE MODE measurements for troubleshooting [LINK] - Louis Rossmann In both cases they recommend putting the red lead to ground and the black lead to the test point (around 6:40 in Jessa's video, and 2:45 in Louis' video). The advantages are apparentl
Cites apadana · 2020-05 · Electrical Engineering Stack Exchange · on “Multimeter diode mode: do different multimeters show the same results approximately?”
Thanks. I've seen that people use diode mode for testing and diagnosing complete boards not just for testing diodes ( example [this video] ). In that situation, the effect of current on measured voltage is usually more significant.
Cites Hadley Siqueira · 2022-05 · Electrical Engineering Stack Exchange · on “Using reverse conduction on board repair”
I am sorry if the title is misleading. As I am not a native speaker, I really don't know what the correct words to be used in the title. If you know the right words, please tell me so I can update the title. My question is about a repair test named "reverse conduction test". I don't know the right name in english but its a literal translation from my idiom to english. "Reverse conduction test" is a test made by people who repair computers and smartphones' motherboard (and probably it applies to any other kind of circuit). It uses the diode mode test of a multimeter but on a different way. These are the steps: take the red probe and place it on ground. take the black probe and place it on the