faulty SSD? or something else...

First, is Windows or whatever OS you use on the SSD? Did you use Samsung's cloning software, or did you do a fresh install? If the SSD is blank, did you tell BIOS that the primary hard drive is your old HDD? It is possible that BIOS automatically chose the 840 as the primary boot device. This most likely happened because the SATA port you put the SSD in is a slot numbered higher than the HDD. If you need any help with getting into your BIOS let us know what motherboard you have, but usually I just tap "F2" or "Delete" repeatedly while booting until it pops up. All BIOS layouts are different, but look for anything regarding boot priority or SATA devices and change the 840 to the primary.

Are both the SSD and the HDD installed? If you still have Windows installed on the HDD, the system will not know which drive to boot from regardless if the BIOS knows that the SSD is the primary. You cannot have two instances of Windows. If you can access the HDD's file system, I would suggest that you select the Windows folder and delete it. You will also have to delete the boot sector in the HDD. Or, to make things simpler, you could try erasing it completely by formatting, just back up any important files first.

If the SSD is the only drive installed, you should probably try formatting and re-installing Windows.

Question, Was:
1) The OS Installation done with the HDD disconnected - Always disconnect all other Hard drives when installing OS to an SSD.
2) What was the Bios set to for control - IDE or AHCI, SHOULD BE AHCI

Why is the SSD on Sata 1 as that will cut the performance of a SATA III considerably.

If You do NOT have at least sata II, you may need to down load the latest BIOS update to properly recognize a SATA III SSD. I know they are suppose to be backward compatable.

If answers to first two questions are NO, or Unknown, then recommend trying a re-install of Windows - HOPEFULLY you are runing windows 7.
.. Disconnect HDDs, connect SSD (ONLY) to > sata I if available.
.. Boot to windows installation disk, BUT stop first to go into BIOS and enable AHCI.
.. When windows install comes up, select custom install. On Page asking where to install, select advanced and DELETE any and ALL partitions on SSD.
.. Complete windows install, let windows do it's updates, install any needed drivers. NOTE: should visit your MB manuf support page and down load any drives needed. Install programs.
Reboot and verify all is GOOD. If Good to go then power down and install HDD - stop at BIOS screen and set boot prioity to SSD.

Help us help you - By identifing MotherBoard make/model and what OS you are using.


Added:
@ jman9295 Quote: the system will not know which drive to boot from regardless if the BIOS knows that the SSD is the primary. You cannot have two instances of Windows. END QUOTE.
NOTE TRUE. The Only problem is if the Install was down with the HDD attached then the "System" partition may be on the HDD, not the SSD. If this is the case then If the HDD is NOT attached when booting to the SSD, or the System partition on the HDD is deleted, then YOU will NOT be able to boot to the SSD - NO system partition.
I often have Multiple Windows installations on a system. I Disconnect all drives except one, install the OS. Disconnect that HDD and install a new OS to the 2nd drive. Connect both drives and using the Boot menue select which HDD to boot to.

Yes, RetiredChief, you are right. I was thinking about cloned drives. When you have two cloned copies of the same drive image this might be his problem. You cannot have two copies of the same cloned operating system on one PC. This is what I meant when I said the computer would not know which drive to boot from regardless if the BIOS knows that the SSD is the primary. When that is the case, there is no boot menu option. I should have clarified that. This may very well be the problem since Samsung 840 drives ship with cloning software on the Magician DVD. I know because I bought one and cloned my drive and got the same error when both drives were connected. This is why I suggested he either erase Windows and the boot sector from the old HDD or format it completely.

2) Use sata1. This is the bottom sata connector closest to CPU/Memory
1) In Bios, go to Advanced-> Integrated Peripherals->Sata. You will see Sat/ahci/ide. select ahci See page 2-6 (Read over section 2 to see how to get into bios, and navigate to where you want to go.

If You do NOT have manual go to: http://us.msi.com/product/mb/B75A-G43.html#/?div=Manual
For drivers see: http://us.msi.com/product/mb/B75A-G43.html#/?div=Driver&os=Win8%2064

@ jman9295 : You can have two cloned drives also.
Just this week at work I had to fix a computer system that they had not installed a SSD correctly and had stuck in a bad HDD.

First I cloned the SSD (A C300) -> a Agillity III. Removed the SSD and the HD. Installed the cloned SSD, booted system and corrected the "Bad" install. I Shrunk the "C" drive" and created a 2nd partition (F-Drive). Checked system and it was fine.
So then I re-cloned the the Agility III -> back on to the Old SSD (C300). installed it. You can boot to either drive by simply hitting "F11) which bringes up the Boot menu and select the C300, or If you just let the Post finish it Boots to the Agillity 3.
BOTH SSDs are Identical clones of each other. Just to let you know this is for a critical Flight Ground support system - They liked the option to boot to the 2nd drive in case the first SSD bombs out during a test.

Terrific. Thanks for letting me know what it was for, I was dying to know. Hope you helped the OP more than you tried to prove me wrong...

It sounds like you may have fixed the hard drive problem and now you have a video card problem. Do you have a discrete video card or an internal video card? Check the back of your PC. How many video inputs do you have? If there is more than one, try the one connected directly to the motherboard. Are you using HDMI, DVI or D-sub (the old VGA)? Can you boot it in safe mode? If you press F8 there will be options for safe mode and there will also be something like enable lower resolution. Try that and see if you can get to the desktop. Once in, you should check to see if you have the correct video drivers installed and if you have the resolution set to the native resolution of your monitor.

Try: Start - search for "msconfig" - click on the "boot" tab -

if there is more than one OS, delete the ones that aren't default. Make sure that the one you know is the right one is the one you keep.

This should stop the boot menu from popping up every time you start the PC. If not, you may have to edit the master boot record. There are a few free programs that are specifically designed to edit the MBR. But, you should try the easy way first.

If you installed the good copy of Windows on drive C: then, yes, you need to delete the G: and F: installs. This should get rid of the boot menu.