Dell Alienware Beep 7 times while booting (no display)
this alienware is working just fine except, there is a USB problem (connect and disconnect every seconds). i've check the solder joint and even change the port, but the problem is persist. seeing that i've decided to change the intel PCH.
after changing the PCH, i got 7 beeps and no display
(from just a usb problem into no display problem) :(
the voltage is normal PLT_RST# is present, LPCH_FRAME also present, there is no short circuit at all
then i thought the new pch is faulty, so i replace it with the old one, sadly the beeps still there.
i bought 2 new PCH (each from a different supplier) and the problem still persist.
i make sure that the PCH replacement is good, i use BGA rework station with 220C, i remove the solder on the pad with solder wick, and give small amount of flux to put the new one.
at this point, im sure that the PCH is not the problem,
from dell website, 7 beeps code means the problem is around the CPU or could be something else.
what i've done
- replacing the PCH 3 times
- checking the short circuit (nothing)
- flash bios and EC (did multiple times with different source bios firmware)
- reset CMOS battery
- change the RAM
when the laptop trying to boot, there is 3 times sequence (fan spin on and off) before the laptop gives the beeps code (the fan is off while the laptop giving beeps code)
and the cpu getting hot while beeping (around 50c)
any help is highly appreciated, thankyou :D
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