開機 problem

開機, when just saw the windows 10 logo, auto power off completely.
Within 10 seconds manual power on again, then 99.9% no problem and system stable.

Use OCCT to check, Power supply, looks fine
CMOS updated, cleared and reset and default.

MB: ASUS Z97 Pro gamer
i5, no OC
HD ADATA 920 (ACHI)
Power supply: Delta 550 (over 8 years!)

MB issue?
Power supply issue?
Windows 10 issue?

THx CHING First

check ram.
use torch to check the output caps in the PS. look for the poped or leaked ones.
if no faults are found. try this:
power off the PS from wall overnight (8 hrs+). then see if the problem still exist.
let us know you findings.

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回覆 2# chanmingfu


Thx, let me get back later today.

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本帖最後由 rictom 於 2015-9-28 10:25 編輯

回覆 2# chanmingfu


  RAM checked by using single and different slots, problem still the same.

Difficult to see into the PS, only can see one big black capacitor, looks fine.

Found one more findings, once I completely unplug the PS for 5 mins. The first boot was  no problem, but problem happened again once I shut down and power on again (this time keep the PS plugged).

So, most probably the PS is the root clause? It is really old, 2005 Sept. manu. used for ten years, 1st gen core2duo -> Quad Core-> now working for i5-Haswell refresh 6 months.

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回覆 4# rictom


Power supply need to replaced !!!

I experienced twice and problems solved once PS replaced...

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本帖最後由 chanmingfu 於 2015-9-28 11:33 編輯

回覆 4# rictom


unlpug ps from wall. wait 1 min,
unplug the all SSD and HDD both sata and power.
take out the display card (if you have one)
connect to monitor using on-board (hdmi or dvi or vga)
power on pc and use mem86+  to check ram.
after testing, if all ram sticks are good turn off pc.
turn on pc,
try a few times, does it auto power down?

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回覆 6# chanmingfu


    Have to be back at night for further testing. Now going out, thx.

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回覆 7# rictom


    that's fine, have a nice day.

just some info,
my guess is the PS is faulty, i believed you will see the bad caps after you take the PS out for  a closer view. but still do the test to make sure. this is also a good time to clean out the dust.

PS. this is like my samsung tv, it will reboot once, then everything is fine, two weeks later, it will reboot more than 20 times, before i can watch tv.
i replaced 4 caps and the problem goes away.

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回覆 6# chanmingfu


    Mem86+ passed, so now can conclude ps is the key?

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回覆  chanmingfu


    Mem86+ passed, so now can conclude ps is the key?
rictom 發表於 2015-9-28 20:42



    yes. based on your results, PS should be cause.  

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