Please Delete had a brain melt down!
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Last edited by sccs; 09-05-2013, 08:17 AM.
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Hello, NO BRAIN A1186? Core i7 a1286 mid 2012
no water damage. around 440mah power and fans at full after a minute
no image no chime start fans amber and green magsafe 1 ok
I have u7400 with EN ok (pin 47), and 5V at (26,19 and 46), TONA and TONB around 12,4V both (pin 48 and 1), missing CPUIMVP_AXG_PGOOD pin 12
Boards stays on if RAM is removed doing same thing.
is brain dead?, what else to test to make sure it is?
thanks in advance
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hi everyone,
i've got this ancient board here, repairing it as an exercise really. it seems to be brain dead.
upon triggering start via SMC_ONOFF the fan starts to spin, USB powers up, CPU gets hot but there is no further activity.
nothing on the video output, no USB activity (using pendrive with an LED).
I've read the bios, it looked ok, valid checksums, model/.mb match etc.
I cleared VSS and wrote the bios back. NO change.
any suggestion as to what might be the cause of this?... -
Hi everyone,
I’m trying to remove a component from a 2021 MacBook logic board, but I’m having trouble.
https://www.electronicsdatasheets.co...s/tlv70733pdqn
I’m using hot air at 480 °C with full airflow and good flux, but the solder paste is not melting.
I know there’s a lot of thermal dissipation from the board, and I suspect the copper planes are absorbing most of the heat.
Do you have any tips for this kind of board? Would a preheater help?
Thanks in advance!
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