monitor can not power up when connect the monitor to PC tower, help!

tfishye · 12-19-2007, 07:13 PM

When I disconnect the monitor from the pc tower, the monitor can be turn on alone itself, once I connect it to the pc tower, the monitor has shown like it get not enough power to turn on. I have test the monitor on another pc tower, and confirm the monitor is working fine. Does that mean something wrong with the power supply or the motherboard in the tower?

More details-
when the computer startup, I can hear few beeps followed by the strong spinning sound from the fan, yet I don't know if the computer can go into window or not because I can not see display from the monitor

What step can I take to further troubleshoot the pc?

**Doby** · 12-19-2007, 07:31 PM

Are you using onboard video or a video card?

You mentioned hearing a few beeps when you should only hear one.

Can you describe these beeps is it one long and two short?

tfishye · 12-20-2007, 01:41 AM

More than two short beeps, about 5 to 6 beeps, not able to get the actual number of beeps sound. I am not sure is onboard video or video card has been used, I have not open the case yet, what happen if it is onboard or not?

Thanks!

Pong · 12-20-2007, 04:36 PM

Some background would help, like, did this computer work for you before? Did someone want to get rid of it and why?

Anyway, the first thing I'd do is open that box to see if anything essential is missing, or disconnected, etc. Unplug everything, turn the computer around, remove the screws along the right edge, slide the side panel off. You can safely power up the computer like this, just don't poke inside while it's on.

The motherboard is getting power from the power supply, and then beeping 'cause something's badly amiss. I'm guessing dead/absent CPU or memory - real show-stoppers. Familiarize yourself with essential internal hardware.

Beep codes vary between motherboards. Try to read the brand & model directly off the motherboard. Then Google beep codes for that particular motherboard. Or you may see the BIOS (CMOS) chip name, e.g. "AMIBIOS" and google from that. Typical beep codes here.

**Doby** · 12-20-2007, 08:08 PM

Quote:

Originally Posted by tfishye

More than two short beeps, about 5 to 6 beeps, not able to get the actual number of beeps sound. I am not sure is onboard video or video card has been used, I have not open the case yet, what happen if it is onboard or not?

Thanks!

Pong has given you some good advice, follow it and get a idea of the parts inside a pc.

In the back where you connect the monitor, the plug that the monitor cable attaches too is connected to either the motherboard or a video card.

Can you tell witch? If we know this we may be able to direct you to reseating the video card.

Also do you know what ram is and where its located?

can you tell us the brand and model of the computer?

tfishye · 12-20-2007, 10:43 PM

I do not sure if I were suppose to open the case or not because this pc still under warranty....

Brand : DELL
Model : Optiplex GX280
CPU Type : P4
CPU Speed : 3000
RAM : 512
Hard Disk Capacity : 80
Monitor Brand/Model : AOC
Monitor Screen Size : 15
Monitor Serial No : J2PJ51A467933

tfishye · 12-20-2007, 11:18 PM

Beeps is 1-3-2 :)

**Doby** · 12-21-2007, 03:04 PM

In this case with the computer still under warranty you should contact dell

12-19-2007, 07:13 PM	#1 (permalink)
tfishye Registered User Join Date: Dec 2007 Posts: 6 OS: xp	monitor can not power up when connect the monitor to PC tower, help! When I disconnect the monitor from the pc tower, the monitor can be turn on alone itself, once I connect it to the pc tower, the monitor has shown like it get not enough power to turn on. I have test the monitor on another pc tower, and confirm the monitor is working fine. Does that mean something wrong with the power supply or the motherboard in the tower? More details- when the computer startup, I can hear few beeps followed by the strong spinning sound from the fan, yet I don't know if the computer can go into window or not because I can not see display from the monitor What step can I take to further troubleshoot the pc?

12-19-2007, 07:31 PM	#2 (permalink)
Doby Moderator Hardware Team Join Date: Jan 2006 Location: Central PA (USA) Posts: 8,077 OS: XP sp2/ Vista My System	Re: monitor can not power up when connect the monitor to PC tower, help! Are you using onboard video or a video card? You mentioned hearing a few beeps when you should only hear one. Can you describe these beeps is it one long and two short? __________________ Would you like to help TSF fight cancer and other diseases??? JOIN TEAM TSF

12-20-2007, 01:41 AM	#3 (permalink)
tfishye Registered User Join Date: Dec 2007 Posts: 6 OS: xp	Re: monitor can not power up when connect the monitor to PC tower, help! More than two short beeps, about 5 to 6 beeps, not able to get the actual number of beeps sound. I am not sure is onboard video or video card has been used, I have not open the case yet, what happen if it is onboard or not? Thanks!

12-20-2007, 04:36 PM	#4 (permalink)
Pong Registered User Join Date: Dec 2007 Location: Vancouver, Canada Posts: 15 OS: XP/SP2	Re: monitor can not power up when connect the monitor to PC tower, help! Some background would help, like, did this computer work for you before? Did someone want to get rid of it and why? Anyway, the first thing I'd do is open that box to see if anything essential is missing, or disconnected, etc. Unplug everything, turn the computer around, remove the screws along the right edge, slide the side panel off. You can safely power up the computer like this, just don't poke inside while it's on. The motherboard is getting power from the power supply, and then beeping 'cause something's badly amiss. I'm guessing dead/absent CPU or memory - real show-stoppers. Familiarize yourself with essential internal hardware. Beep codes vary between motherboards. Try to read the brand & model directly off the motherboard. Then Google beep codes for that particular motherboard. Or you may see the BIOS (CMOS) chip name, e.g. "AMIBIOS" and google from that. Typical beep codes here.

12-20-2007, 10:43 PM	#6 (permalink)
tfishye Registered User Join Date: Dec 2007 Posts: 6 OS: xp	Re: monitor can not power up when connect the monitor to PC tower, help! I do not sure if I were suppose to open the case or not because this pc still under warranty.... Brand : DELL Model : Optiplex GX280 CPU Type : P4 CPU Speed : 3000 RAM : 512 Hard Disk Capacity : 80 Monitor Brand/Model : AOC Monitor Screen Size : 15 Monitor Serial No : J2PJ51A467933

12-20-2007, 11:18 PM	#7 (permalink)
tfishye Registered User Join Date: Dec 2007 Posts: 6 OS: xp	Re: monitor can not power up when connect the monitor to PC tower, help! Beeps is 1-3-2 :)

12-21-2007, 03:04 PM	#8 (permalink)
Doby Moderator Hardware Team Join Date: Jan 2006 Location: Central PA (USA) Posts: 8,077 OS: XP sp2/ Vista My System	Re: monitor can not power up when connect the monitor to PC tower, help! In this case with the computer still under warranty you should contact dell __________________ Would you like to help TSF fight cancer and other diseases??? JOIN TEAM TSF