Optiplex Desktops

Last reply by 02-28-2019 Unsolved
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790 problem

Hi,

My 790 Mini Tower has been running flawlessly for ages ... up until a few days ago.

Now, most of the time, when I press the on/off button nothing happens.

When I hit the test power supply button in the back it lights up green and I can hear the fans working.

Every once in a great while it will turn on... for literally about three seconds. 

The diagnostic lights go from 124 to 34 and last to 3. Then it dies.

The blue hard drive activity light functions normally in this very brief timespan.

What do you think? Power button wiring? Motherboard? What else could it be?

I don't want to start buying replacement parts until I'm at least pretty sure what the problem is.

Any help with this will be appreciated.

Thank you.

Replies (16)
865


@speedstep wrote:

Running office applications and using the network doesn't get faster with newer faster hardware.


Come on, of course it does.

Excel and Access are performance hogs when using extremely large files (like the financial/bank/trading environment), and the CPU processing of a 6-core 8/9-series far outstrips anything else I own right now. And we're talking multiples faster at processing large Excel or DB files.

And yes, these all have 16GB DDR3 or DDR4 and an SSD, naturally. The only real difference is the older/slower CPU and chipset + subsystem.

On a fast 4-series i7, I used to sit there watching the screen refresh over and over and over, waiting for formulas to update, but now on an i7-8700 the formula updates just whip by in no time. Same with Access - queries and data loads are significantly faster, and I also program a bit and compiles are also noticeably faster on the newest CPUs. I also have an old 2-series i7 dual-core that will virtually lock up during these processes, showing "Excel is not responding" for maybe 5 minutes before it was done. That same job takes me maybe 30 seconds on the new system. To me, that's no joke.

In fact, office work number-crunching is the main reason to upgrade CPUs (within recent vintage), as games are almost entirely GPU-limited.

850

"Come on, of course it does."

Excel and Access are performance hogs when using extremely large files (like the financial/bank/trading environment), and the CPU processing of a 6-core 8/9-series far outstrips anything else I own right now. And we're talking multiples faster at processing large Excel or DB files.

 

Excel and Access are static files.  Your fingers don't type Data into databases any faster with a faster machine.  Managers buy 500 percent faster hardware and expect that data entry people will do their jobs 500 percent more efficiently.  This is absolutely not the case. Here is another way to look at it. A faster machine isn’t going to be speeding up your data entries or any other Item that requires input from a human. It does allow you to make query's faster on both server and client end.  Being able to input data faster is only as fast as the slowest input. Instead, it’s all about iteration. A faster database time allows you to see your changes faster but isn't necessary for most of the work of my clients.

This is why even ancient machines like the Optiplex GX620 with 2.8Ghz Pentium D pressler processor are fine for most things. 

https://www.youtube.com/watch?v=PMO1AE8QoNU

 

 

 


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847

Obviously we're not talking about something simplistic like the speed of data entry (i.e typing), but the actual end-user processing involved in larger Excel or Access files.

You're talking about the speed someone builds a Tesla, and I'm referring to how fast it can actually go in the real world. Two totally different things.

844

If you are using it for games that's one thing.

If you use for general use, Youtube, Email,  Office 365,  Chrome, Firefox, etc having a faster machine is relative.

Processing Large Database files or Video Rendering or SQL Databases etc benefits more from faster Server hardware and faster network connections.  The Clients logging into these systems can be quite old and still do windows 10 and office 2016 and other things without needing to buy a NEWER faster machine.

People coming here and wanting to fix or use machines older than 2006 should buy a newer machine so that they can use 64 bit windows 10.

 

 

 


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839

Hello again,

 

We seem to have gotten pretty far afield here.

 

The problem is the on/off switch. He ordered one from ebay for less than $10.

 

Looks like I'll be keeping it.

828

"Every once in a great while it will turn on... for literally about three seconds.

The diagnostic lights go from 124 to 34 and last to 3. Then it dies."

Shutting Down and 124 or 34 is NOT the power button.  Shutting down is power and or overheating issue.

The disagreement is whether or not you buy an exact replacement or a new machine.

 


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825


@inonada wrote:

Hello again,

The problem is the on/off switch. He ordered one from ebay for less than $10.

 

Looks like I'll be keeping it.


Good job and hopefully that fixes all the problems.

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