Hello all
I have a a1278 820-3115 first no power I changed the smc no I have the fan spin all voltage present even get cpu core 1.1v but no chime no display. I programmed. The bios same problem I notice 2 things the system led is solid and the the spi rom pin 5 and 6 have no voltages in on state. But if I power down the laptop then I see all voltages on the spi rom. Also plt_rst_l i3.3v and buffer side 1.05v.I have changed 3 smc and now the intel hm77 chip also still same problem
What signals to check.lid switch also okay without ram should give us beeps
Thanks
I have a a1278 820-3115 first no power I changed the smc no I have the fan spin all voltage present even get cpu core 1.1v but no chime no display. I programmed. The bios same problem I notice 2 things the system led is solid and the the spi rom pin 5 and 6 have no voltages in on state. But if I power down the laptop then I see all voltages on the spi rom. Also plt_rst_l i3.3v and buffer side 1.05v.I have changed 3 smc and now the intel hm77 chip also still same problem
What signals to check.lid switch also okay without ram should give us beeps
Thanks
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