My Dell Optiplex SX270 fails to start when I press the power button. I made sure all cables were secure, which they were. I then saw that the light on the adapter was green so I knew it was getting power, I then saw that on the inside of the computer an orangish, yellowish light was on, so I knew the CPU unit was recieving power, but the unit still failed to start. Please help me
I'm reasonably sure that it is a bulging or bad capacitor issue. We have had Dell replace a large number of motherboards on SX270 and GX270 computers, due to underpowered or counterfeit capacitors on a large batch purchased back in 2005. The capacitors swell or burst until the computer will not turn on anymore. You'll get the amber light inside the unit, plus a green light on the power supply, but the computer will not power up. You can try the solder technique, but you'd be better off replacing the system board, if possible. Happy trails!
I have seen the same probelm on other dell computers. They have a problem with ther capasitors that dryes out. If you open the computer, it is possible to identify the bad capasitors, the have a round top (normally flat). It is normally 6 to 8 capasitors, that are faulty. A repairkit can be bought and if you have experience in soldering, then the computer should work after replacing the capasitors. I did it with success
The problem is that the capasitors used aren't specified to be used in this temperature range and thats why they stop working after a while
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This computer only has one space for a 2.5" hard drive (IDE ATA100). Unplug all external cords from the computer (including the power cord) and press the power button (this grounds the system board). Remove the mounting plate and cable cover if these are attached. Place the unit on its side with the back connectors towards you (power supply to the left) and slide the release button towards the right. The hard drive door should open. Ground yourself by touching unpainted metal on the case. Rotate the door up and remove the data cable from the drive (carefully). Raise the release tab (on the opposite side from the data cable) and pull the drive up and away from the door. If you need to, remove the sled from the old hard drive (4 screws, 2 on each side) and attach the sled to the new drive. (If the new drive came with a sled, skip this step.) Slide the new drive onto the drive door. Attach the data cable carefully to avoid bending the pins (just the ribbon section is used, the other 4 pins are left bare). Slide the drive into the drive bay and lower the door to lock it into place. Replace the cord cover and mounting plate if in use and connect all of the external cables. Plug the network cable into the wall jack, router, or modem before connecting it to the computer. Follow the directions that came with the drive for any software installation. Reboot the computer, partition and logically format the hard drive. See the OS documentation for this step. Test the hard drive by running the Dell Diagnostics, http://support.dell.com/support/edocs/systems/opsx270/en/ug/adtshoot.htm#1172888 . Install the OS for your system.
If the chassis alert comes on at the next reboot, reset it (contact IT if there is a password on the BIOS).
Disconnect the Power cable / A/c adapter/Battery from computer.
Disconnect External peripherials.
Hold down the power button on the computer for 10 seconds.
Reconnect the power cable or A/c adapter and battery or the computer
Try to turn on the computer
check for Led's on the computer
If still no display ,shut down the computer,disconnect power cable.
Open the computer tower,remove memory modules,reconnect power cable and turn on the computer.If you get a beeping sound after turning on you should be getting beeping sound suggesting the mother board is not bad.Turn on the computer and disconnect power cable from computer.
Reseat 1 memory at a time if you have 2 memory module or if single memory module reseat in different memory slot,swap memory module.
Reconnect the power cable and turn on the computer if it boots to desktop possible issue with 1 of the memory module.
Disconnect the harddrive ide cable from the harddrive .Turn on the computer.
If still unable to power on .Shutdown the computer and disconnect power cable.Remove video card,sound card ,modem card if any .Connect just the vga cable from monitor to the integrated video port.
Connect power cable and turn on the computer.
If computer turns on possible issue with one of PCI or PCI express card.
If still unable to power on.Disconnect the power connector pin from the motherboard and reconnect it back.Turn on the computer check power power led on motherboard,also check if the processor fan is spinning. if no go then issue with motherboard. Good Luck.!!
the power supply is probably bad. It's really hard to tell without a little more information. When my power supply went bad on my computer. the hdd light would come on but nothing else and the computer would not even try to start.the power supply puts out several different voltages with both positive and negative outputs.
First of all, keep the front button pressed until the system shuts off. It might be one of several causes: 1) Memory module damaged (or dirty) 2) The processor is damaged, or 3) The motherboard parted off. Remove the memory modules and test them one by one. Or if you can test them in another PC (assuming both PCs use the same kind of modules).