20 Most Recent Dell Optiplex 755 Energy Smart Minitower Intel Pentium Dual Core Processor E2160 Questions & Answers

Dell Optiplex are great PCs but I don't speak French so I hope this helps.

Go to www.support.dell.com

1) Reboot, then when it is starting up, press F8. 2) Click "Repair my computer". 3) Select the keyboard layout and lanugage. 4) When you get to system recovery tools, select System restore. 5) Select the restore point when it was working fine and restart the computer. 6) Best of luck!

I work at a college and had this same error with a nice few of the Optiplex 755's. However it was due to the power supply failing, nothing with the mother board. Have you tried replacing the power supply?

you will have to open up your network connections click start control panel network connections this may vary depending on your operating system look for local area connection if you see a red x or a yellow exclamation or question mark ! ? you will need to update or install the driver or it could be firewalled If you are trying to connect through a modem/router you it should have come with a disk then you might have to connect the usb lead to your modem to get a connection then click start control panel administration tools computer management device manager scroll to network adapters should see a yellow question / exclamation mark ? ! or a red X right click install drivers the driver might be on the disc supplied by your ISP internet service provider or the motherboard disc

click start type cmd press enter you will be in DOS mode

type in ipconfig press enter

you will see all o fyour internet connection details type in your default gateway adress into your internet search should read something like 10.0.0.138

Make sure you Ethernet/internet is enabled in bios restart your computer during the boot up process you will see on your screen a certain key to

press to enter set up (BIOS) press and hold that key to enter bios using arrow keys navigate to integrated peripherals look for SiS On Chip Pci Device press enter scroll to SiS 10/100m press enter make sure its enabledimake sure its enabledPci device arrows key scroll to nstalled. hope this helps

Dude, you got a dell...... don't worry, I had one too.(it's a useless chunk of metal atm)
Anyway, I would blame this on whomever repaired your motherboard and hold them responsible to fix it. After several years of hell with my dell I learned that maintaining them is not worth it. With a little knowledge, keeping most PCs running for 5 years is feasible. Dells, however, are not most PCs. In my experience, Dells are the most problematic PCs around. Time to trade up. (or better yet, build your own like I did!)

You could take the CMOS battery out of the motherboard, unplug the power cord and hold the power button in for about 20-30 seconds. Plug it back in and turn it on without the battery in it and it should come up with the bios. Turn the machine back off and reinstall the battery. When you turn it back on you should be able to press F2 for setup or F12 for the boot menu.

Larry provides great information. Larry Ng Apr 30, 2022 good news the not told at all PC screen is not dead. a major fact but lacks all evidence like: 1, No PC told no OS told xp to w11 2: fans spin? all do, psu ,cpu and gpu card if fan. 3: Optiplex is a desktop 29 years of models made wow. 4: you mean Dell Splash logo. yes, and then it does the post bar, if post bar stalls that means hardware gross errors. sadly no PC model told of vast versions. wow. just wow hopeless that.? but is par here, and vast wrong answers just for that fact alone.even mine. i have many optiplex PC here old and new and my fav is 9020MT or smaller my oldest is 380(in storage) is your coin cell dead. (if yes can NOT be ignored) my dells all have F12 diagnostics, power on and hammer F12,, pick diag eSPA and run it older PCs dell if the HDD is dead the F12 diag is dead. due to being located there back long ago. my dells have a BIOS log page, go to BIOS the click tab, LOG read the logs. see what fails. (coin cell RTC sure)_ easy no?\ but why on earth post lacking the model number making any useful simple help 10 pages long for 29years of models. 1993 is the first OptiPlex, seen here. https://en.wikipedia.org/wiki/Dell_OptiP... nobody can guess and no era is the same. evolution max. ..

What is the exact error that you are getting? Do you get any blue screens? Have you installed any software recently or made any changes? I can only suggest checking the power cables and trying to use a different cable or spare if you have any for now.

Sounds like your on Google Chrome, this has started popping up since the last update and only on secure webpages at random, try running Windows Update and make sure it's up to date, it check the root certificates which should come with the windows updates.

Please see picture below

ok 960 SFF is not the same as MT or the big case MOBO.SFF has its own mobo (motherboards)it has 11x2 row non ATX spec, power . not yours as it has 12x2 some SFF have 2 diffr. moboand a dell custom PSU for just this mobo and its odd duck jack. (called PICO plug)why not buy a new PSU? that matches this PC?even the SFF PSU case is not ATX spec.https://downloads.dell.com/manuals/all-products/esuprt_desktop/esuprt_optiplex_desktop/optiplex-960_service%20manual_en-us.pdf

Go into device manager. Uninstall audio driver. Restart computer. This will reinstall the default driver. Try again. If it doesn't work, go to Dell website to find specific driver for your computer (using the service tag) and install that.

Desktops PCs usually have a 'jumper' on the motherboard, inside of the PC, that resets the BIOS, removing the password but also changing some settings to their defaults. It takes some 'know how' but you can google it to help you locate it.

What are you talking about? Video card?