By
qamar198
Hello Everyone,
I am trying my Sager NP 9377 to get to work but to no avail. NO POST, NO DISPLAY.
in short>> powering on laptop causes fans to run at full speed after 10(cpu only) + 10 (now both cpu+gpu) with Caps Lock + Num Lock + Scroll Lock LEDs blinking, continuous 1 second beep, repeats for one minute with 1 second in between, then laptop shuts down.
IN DETAIL
System Specs are i7 4810mq 8gb gtx 880m SLI variant (though my laptop has other GPU Slot empty so only singular 880m running) 120 Hz display.
The Problem
> if i take out the battery and plug in AC only, the power light comes on ORANGE
if both battery is connected, then i have both power and battery light ORANGE
and if only battery is connected then of course laptop is waiting for me to press the power button
but in all 3 cases the following happens
> Pressing the power button brings laptop to some signs of life, power LED turns green, both the CPU and GPU fans have a very quick jerk but does not spin., keyboard lights up with Blue Backlight (dont know if this is relevant or not), HDD activity light starts to blink showing HDD access maybe (even when hdd is removed)
> Display remains blank (i dont even sense the display backlight being on)
> HDD activity light sometimes goes off after only 1-2 seconds, sometimes shows rapid blinking/activity for 4-5 seconds
> both fans remain off (i removed back cover to check this)
> after about 10 seconds or so, the CPU fan spins up (speed is normal, just like when using the laptop in IDLE)
> after 10 more seconds have passed, the CPU fan seems to be turning off for a split second then both the CPU and GPU fan turn on full speed with a lot of noise.
> Caps Lock, Num Lock and Scroll Lock LEDs all blink together with single beep for about 1 second, repeats beep with 1 second in between.
> goes on for about 1 minute then laptop shuts down.
> forcing the fans to spin down using FN+1 key makes them spin back up to full speed after a split second (dont even know why i tried this one -_-)
What I Have Tried So Far
> EC and Bios Reset (take out battery, disconnect AC Adapter, disconnect CMOS Battery, Press Power Button for upto 30 seconds)
> Change Ram and check all available slots
change/remove HDD
> Repaste CPU/GPU and clean out fans
> Checked GPU...... Flashed the 880m in this Sager with MSI vBios and tested it in a MSI Gt70 2PC i have, gpu ran fine, tested with FurMark, AC Odessey, Ghost Recon Wildlands for over an hour (unfortunately the cooling in my MSI is not good enough it already runs hot, and this 880m causes thermal throttling as well as power limit throttling sometimes). Reflash 880m with original Clevo vBios and put back into the Sager, still no boot, same results as before.
> Checked the CPU..........checked the 4810mq in the MSI GT 70 which worked fine, as well as tried the 4810mq from the MSI in the Sager, still no boot.
> Suspected bad GPU fan connection......therefore forced both fans to full speed as soon as i press power button (using FN+1 Keys) and both fans turn on full speed, same results.
> tried charging the battery to the max before turning on on battery only, same results.
>>------- The laptop has had some random shutdowns in the past too during gaming but would turn back on fine after waiting for 10 mins or so, then i sold it to some guy who brought it back to me the next day saying that it just turned off during gaming and wont turn back on, i returned his money, did all the troubleshooting above to no avail. then i finally put it aside to wait until i get some other system in which i can test the CPU and GPU.
Then one day i turned it on (after leaving it untouched for a couple months), same results as above, i decided to try once without battery and it Freakin Turned ON!!!, used it for a couple days without battery, played a few games (thermal throttling was observed here and there), but then this happened again and this time it seems permanent . And now i have not only repeated all the steps above but this time also checked the CPU and GPU in the MSI GT70 too. ------------<<
Some Observations
> touching the CPU heat pipes feels warm, but the GPU heat pipes are colder (GPU never even booted?). dont know if this is normal or not.
> i replaced one of the capacitors near the CPU once, but i did use the laptop for quite a while after that without any issues.
> my Idle temps were always below 40c for both CPU and GPU, so an overheat warning as soon as laptop is powered on seems unlikely (false overheat warning?, but GPU does not even seem to be detected/ booted as heat pipes remain cold to touch), also i repasted the CPU and GPU multiple times.
> The guy who sold me the laptop told me that the power adapter was originally a Dell, and it was modified to use with this Sager by replacing the cable with a 4-Pin one from a Toshiba (same pinout as the Sager), but then again i have used this laptop for quite a while on the same adapter.
> From day 1 of having this laptop, some keys on the keyboard (w, s, t, c and numpad 4) did not work 99% of the time. pressing really hard on any one of them sometimes made ALL of them work for a while. any thoughts on this issue?? (even if its unrelated).
So what seems to be the issue here?
GPU not detected ?, False temperature alert?, Bad fan?.
Any help towards resolving this will be greatly appreciated.
Thanks in advance .
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