<![CDATA[iFixit - Answers With Device "Dell Optiplex 790"]]> https://www.ifixit.com/Answers/Device/Dell_Optiplex_790?rss=yes en-US Sat, 04 Apr 2026 16:08:43 -0700 <![CDATA[Dell Optiplex 790: Why is the computer not powering on]]> the pc start and it suddenly shut down with in second and it repeat the process again and again i changed the power supply and the problem is not fixed

⟐ Commented June 13, 2023 at 1:09 MST

]]> https://www.ifixit.com/Answers/View/796550/Why+is+the+computer+not+powering+on https://www.ifixit.com/Answers/View/796550 Tue, 13 Jun 2023 01:09:55 -0700 <![CDATA[Dell Optiplex 790: It is not booting up it is displaying 4 and 2]]> Why is my dell optiplex 790 not booting up to windows screen..it just run blank screen while displaying 4 and 2

⟐ Commented March 04, 2026 at 18:50 MST

]]> https://www.ifixit.com/Answers/View/862676/It+is+not+booting+up+it+is+displaying+4+and+2 https://www.ifixit.com/Answers/View/862676 Wed, 04 Mar 2026 18:50:07 -0700 <![CDATA[Dell Optiplex 790: چرا کامپیوتر صفحه نمایش نمیده computer not display the screen?]]> کامپیوتر من صفه نمایش نمیده

Translation Persian - English

Why does the computer not display the screen?

My computer does not display the screen

⟐ Answered November 17, 2024 at 8:56 MST

]]> https://www.ifixit.com/Answers/View/877372/%DA%86%D8%B1%D8%A7+%DA%A9%D8%A7%D9%85%D9%BE%DB%8C%D9%88%D8%AA%D8%B1+%D8%B5%D9%81%D8%AD%D9%87+%D9%86%D9%85%D8%A7%DB%8C%D8%B4+%D9%86%D9%85%DB%8C%D8%AF%D9%87+computer+not+display+the+screen https://www.ifixit.com/Answers/View/877372 Sun, 17 Nov 2024 08:56:54 -0700 <![CDATA[Dell Optiplex 790: I face a problem when I starts th pc I sees an error of bootmgr]]> Boot mgr problem how to solve it

⟐ Answered September 07, 2025 at 10:38 MST

]]> https://www.ifixit.com/Answers/View/915897/I+face+a+problem+when+I+starts+th+pc+I+sees+an+error+of+bootmgr https://www.ifixit.com/Answers/View/915897 Sun, 07 Sep 2025 10:38:01 -0700 <![CDATA[Dell Optiplex 790: My internet is not working]]> When I put the internet cable it doesn't work it show me in the screen that there is no internet by the way my it is windows 7

⟐ Answer edited August 26, 2025 at 21:32 MST

]]> https://www.ifixit.com/Answers/View/914054/My+internet+is+not+working https://www.ifixit.com/Answers/View/914054 Tue, 26 Aug 2025 21:32:48 -0700 <![CDATA[Dell Optiplex 790: Why my power light is blink]]> why do my computer power button light is blink always

⟐ Answered September 24, 2024 at 22:40 MST

]]> https://www.ifixit.com/Answers/View/870781/Why+my+power+light+is+blink https://www.ifixit.com/Answers/View/870781 Tue, 24 Sep 2024 22:40:50 -0700 <![CDATA[Dell Optiplex 790: Blue screen error problem due to RAM]]> Blue Screen error problem due to RAM

⟐ Answered June 16, 2024 at 6:41 MST

]]> https://www.ifixit.com/Answers/View/854908/Blue+screen+error+problem+due+to+RAM https://www.ifixit.com/Answers/View/854908 Sun, 16 Jun 2024 06:41:25 -0700 <![CDATA[Dell Optiplex 790: Is there a way to replace the main power button on the case?]]> Hi, I have a Dell optiplex 790 that the power button has lost its spring. Is there a way to replace it?

Update (06/13/23)

It's a standard desktop...

⟐ Answer accepted June 13, 2023 at 9:08 MST

]]> https://www.ifixit.com/Answers/View/796653/Is+there+a+way+to+replace+the+main+power+button+on+the+case https://www.ifixit.com/Answers/View/796653 Tue, 13 Jun 2023 09:08:02 -0700 <![CDATA[Dell Optiplex 790: My pc is not turning on]]> Pc is not turning on but it was running good last night

]]> https://www.ifixit.com/Answers/View/948339/My+pc+is+not+turning+on https://www.ifixit.com/Answers/View/948339 Fri, 03 Apr 2026 02:35:26 -0700 <![CDATA[Dell Optiplex 790: Power saving mode enable]]> Pls someone help me when I open my pc the lcd showing every time "powe

]]> https://www.ifixit.com/Answers/View/922151/Power+saving+mode+enable https://www.ifixit.com/Answers/View/922151 Thu, 16 Oct 2025 10:07:17 -0700 <![CDATA[Dell Optiplex 790: Why is MB not power on]]> Motherboard not power on

]]> https://www.ifixit.com/Answers/View/879453/Why+is+MB+not+power+on https://www.ifixit.com/Answers/View/879453 Thu, 05 Dec 2024 10:16:30 -0700 <![CDATA[Dell Optiplex 790: How to change power supply]]> How to change power supply ok but not on my pc

]]> https://www.ifixit.com/Answers/View/867620/How+to+change+power+supply https://www.ifixit.com/Answers/View/867620 Sun, 01 Sep 2024 21:45:44 -0700 <![CDATA[Dell Optiplex 790: power supply not working]]> How to fix power supply

]]> https://www.ifixit.com/Answers/View/858970/power+supply+not+working https://www.ifixit.com/Answers/View/858970 Thu, 11 Jul 2024 05:21:55 -0700 <![CDATA[Dell Optiplex 790: dell optiplex 790 are 6 times beep sound]]> dell OptiPlex 790 are 6 times beep sound

⟐ Commented October 12, 2023 at 7:13 MST

]]> https://www.ifixit.com/Answers/View/818902/dell+optiplex+790+are+6+times+beep+sound https://www.ifixit.com/Answers/View/818902 Thu, 12 Oct 2023 07:13:17 -0700 <![CDATA[Dell Optiplex 790: Why is my jack input not working?]]> I have a Dell Optiplex 790 for a couple of years now and I have it in an old desk that has a a little plank a wood to separate the desk from the floor. I usually have speaker connected to it. It all worked fine until one day I was working with some stuff around the pc when all of a sudden the pc tilted and went foward to the ground but it got pulled back by the speaker cable. After that day the jack didn't work the same. After some time I had to force the cable in to an angle where the jack had to be pulled upwards. After a while of having that the speakers didnt work and the sound was coming out from the tower.

I think it might be broken but im not completely sure. If it is, how can I repair it?

⟐ Edited February 17, 2026 at 8:37 MST

]]> https://www.ifixit.com/Answers/View/457839/Why+is+my+jack+input+not+working https://www.ifixit.com/Answers/View/457839 Tue, 17 Feb 2026 08:37:51 -0700