I just proceeded to the new installation of Z97 gaming 7 motherboard.
I am building this machine from A-Z.
I installed the PSU, the CPU fans, and a I7-4770k.
All this in a R4 Define case.
All this is brand new.
The processor is compatible with the Gaming 7 motherboard.
I used 4x8 Gb ram sticks and a Corsair SSD 240 Gb drive I already had.
The ram sticks are Kingston 8Gb 2Rx8 PC3L-12800U, which were working fine in my previous computer.
I installed a GTX 660 TI GPU I already had and which was working fine.
When I power up, the motherboard light shows that it detects the drive.
The codes shown on the debug LED are also 10, 15, and 55.
No reference found on the code 10.
I removed the graphic card and tried booting without it.
I unplugged all the motherboard battery connectors coming from the PSU, then re-connected them.
I removed the motherboard battery, waited and re-installed it.
I tried clearing the CMOS.
I tried booting from the second CMOS also.
I unplugged all PSU cables to the motherboard and replugged them.
The same debug codes appear.
It seems the system boot up, as the motherboard shows signs of activity, but no screen at all.
My screen reacts as if it was unplugged.
The debug code 10 is unexplained, I found no reference to it.
Is it because there are no CMOS instructions left?
And if yes, how to put them back in if the system wont even start?
I tried with only 1 ram stick, no change.
I am at loss now, I invested a lot of money in this.
Any suggestion?
Update.
I made a lot of research on internet.
First, have a look at the web site of American Megatrends.
Type "Aptio 4.x status codes".
This brings in the PDF files showing all the debug codes.
Code 10 : PEI core is started.
Code 15: Pre-memory north bridge initialization is started.
Code 55: memory not installed !
I am not a pro in computer.
But I believe the first 2 codes are standard start-up procedures.
The code 55 reveals the probable cause: the motherboard does not recognize the memory sticks installed.
It's possible because the memory sticks I used came from an Acer machine I bought almost 2 years ago, and this computer proved itself almost impossible to upgrade.
So I got into the process of purchasing ram sticks, I wished to install 16 Gb of them.
First I searched the web with "MSI Z97 GAMING 7 Compatible RAM".
The site of PC-specs.com shows the compatible ram sticks for the Z97 Gaming 7 mobo.
Some of them.
Corsair is a big name, so I investigated the sticks advertised there.
First it proved hard first to find on the market the sticks shown as compatible with my mobo.
There are so many different types sold on the market (I wonder why?), I spent hours looking at all these specs.
I decided that I want a stick running at 1866 Mhz with a minimum timing of 9.
And I wanted to be able to overclock without the system failing because of the ram.
It was a pain in the neck to locate any of the suggestions shown in the MSI Z97 GAMING 7 Compatible RAM chart.
And worse of all, many reviews of customers showed that often these sticks are defective, either when received or a short while after installation.
Particularly the Corsair brand, who advertises a lot.
So I focused on the company Crucial.
They have a web site "Crucial.com" which enables a customer to verify the compatibility of a ram stick model with a mobo.
I finally decided to purchase the following sticks:
Crucial Ballistix Tactical 16GB (4 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Low Profile Desktop Memory Model BLT4K4G3D1608ET3LX0.
It has a CAS of 8: fast.
And expensive (269$ Can, tax and delivery included).
But the customers reviews are excellent.
So now it is in the mail, waiting to see if I can finally power-up this mobo.
Got my new memory sticks and installed them.
You know what? Same damn codes 10,15 and 55 appear on boot-up.
Can't access the boot-up screen.
I made a request to MSI support to this address:
http://service.msicomputer.com/msi_user/support/ts_form.aspx.
I got almost immediatly and answer, which is:
Dear customer, please kindly put only one stick on the Dimm2 and recheck the issue. Debug code 55 more likely the memory issue and try to reseat the processor as well. Thanks!
So I tried different combinations, like 1 stick in dimm1,...
The boot-up screen finally appears when a memory stick is installed in dimm3, or 2 in dimm3 and dimm4.
If anything installed in dimm1 and/or dimm2, no boot-up and the same debug codes appear again.
I made a follow-up to MSI support.
The answer was:
Dear customer, if you can access the bios then try to update to the latest bios version and recheck the issue.
Friendly reminder update bios is risky and do it at your own risk! Thanks!
http://us.msi.com/support/mb/Z97_GAMING_7.html#down-bios
I am going to do that now.
After a lot