Highlighted
2 Bronze

Optiplex 790 SFF RAM Errors

Jump to solution

So I have a 790 SFF that's been sitting unused for a couple months, since I switched over to a 790 minitower.  Anyway, at startup I get a solid blue power button, as well as a solid 1 and 3 amber numbers.  Dells support documents say that means this:

" Memory modules are detected, but a memory configuration or compatibility error has occurred."

But I know the RAM works fine, and even when I swapped out RAM from my 790 minitower, which was what came in the SFF originally, I still get the same problem. So even the very same RAM I used in the SFF when it was my main system won't work.  And I'm now running that same RAM again in my minitower, and typing this post with it.  Also, I tried this with both an i5 2400 and an i3 2100.  Same result.

The system doesn't post at all.  Just sits there powered on with the lights mentioned above.

So what can I do?  It doesn't like any RAM at all.

0 Kudos
Reply
1 Solution

Accepted Solutions
Highlighted
4 Ruthenium

Re: Optiplex 790 SFF RAM Errors

Jump to solution

There's 2 methods to try with the RAM.  Remove the RAM down to one stick.  Power up and see what it does.  If the error doesn't repeat, insert one stick, power up, and so on.  If you know all of your RAM is working, this could eliminate a bad DIMM slot.  Of course, power off and unplug anytime working on the inside of a PC.  Use power button to drain power from it when unplugged.

The second method:  With all 4 sticks of RAM, or however many you have, just one at a time in slot 1.  Do this if the error, blue light and 1 & 3, just keeps repeating.  What if it's slot 1?  Try one known working stick in all the slots.  Furthermore, with 2 sticks of RAM, try slots 1 & 3 and then 2 & 4.

You said the RAM works in your 790 MT.  If the above troubleshooting steps don't work, it's likely a bad MB.  As proven in this forum, the 790 is pretty flexible in terms of RAM as compared to some other units.

- Please kudos posts you like.
- Please "Accept as Solution" posts that are a solution.
- If you have an Optiplex, stating its model number AND size speeds troubleshooting. Components vary.

I'm a big fan of Dell, a Dell user, and not an employee. This forum is mainly user to user with occasional moderation or additional knowledge by a Rockstar or Dell employee.

View solution in original post

0 Kudos
Reply
19 Replies
Highlighted
3 Cadmium

Re: Optiplex 790 SFF RAM Errors

Jump to solution

My first thought is there's a problem on the motherboard. Check for anything shorting traces on the circuit board or memory sockets (like christmas tinsel, etc.)

Most likely the mainboard died.

 

 

0 Kudos
Reply
Highlighted
2 Bronze

Re: Optiplex 790 SFF RAM Errors

Jump to solution

I just tried with no RAM at all and got the no RAM indicator, which is a solid blue power button, and solid amber 1.  So it can see when RAM is or isn't there, but can't use it.  It's the exact proper spec the system needs. 

0 Kudos
Reply
Highlighted
4 Ruthenium

Re: Optiplex 790 SFF RAM Errors

Jump to solution

Replace the size 2032 CMOS battery if it hasn't been done within the last 5 yrs.  A low battery can cause all sorts of bizarre problems.  It can often be one of the first things to rule out when problems occur.

- Please kudos posts you like.
- Please "Accept as Solution" posts that are a solution.
- If you have an Optiplex, stating its model number AND size speeds troubleshooting. Components vary.

I'm a big fan of Dell, a Dell user, and not an employee. This forum is mainly user to user with occasional moderation or additional knowledge by a Rockstar or Dell employee.
Reply
Highlighted
2 Bronze

Re: Optiplex 790 SFF RAM Errors

Jump to solution
0 Kudos
Reply
Highlighted
3 Cadmium

Re: Optiplex 790 SFF RAM Errors

Jump to solution

$16 CAD for a 2032 battery? You can do better than that I think.

 

0 Kudos
Reply
Highlighted
2 Bronze

Re: Optiplex 790 SFF RAM Errors

Jump to solution

What are you talking about?  It's $5 Canadian for 5x batteries with free shipping.

Are you okay?  Because I think you're seeing things.

0 Kudos
Reply
Highlighted
3 Cadmium

Re: Optiplex 790 SFF RAM Errors

Jump to solution

It says

Shipping:
C $10.99 Canada Post
 
 
0 Kudos
Reply
Highlighted
4 Ruthenium

Re: Optiplex 790 SFF RAM Errors

Jump to solution

Ha ha ha, but, here in the U.S., it shows $10.99 shipping.

Something I haven't repeated for a while is Sony batteries look like a good deal, but they don't last 5 yrs.  They lasted me around 2.  Energizer and Duracell do better.

Capture+_2020-06-20-20-32-15.png

 

- Please kudos posts you like.
- Please "Accept as Solution" posts that are a solution.
- If you have an Optiplex, stating its model number AND size speeds troubleshooting. Components vary.

I'm a big fan of Dell, a Dell user, and not an employee. This forum is mainly user to user with occasional moderation or additional knowledge by a Rockstar or Dell employee.
Reply
Highlighted
2 Bronze

Re: Optiplex 790 SFF RAM Errors

Jump to solution

I guess it's obviously more expensive for Americans.  I'm in Canada though.

Also, I confirmed they were the same type of battery that was in my SFF, so I already bought them, and there are 5.  But I will take your advice for next time and buy Duracell or Energizer.

Screen Shot 2020-06-20 at 6.55.00 PM.png

0 Kudos
Reply