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Just Time Posted on May 09, 2007
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Power issues on new build

Recently built a new PCI-E system. The problem is the system will ramdomly not power on. If you press the on/off on the psu and press the case power button in the wrong order it fails to power till you leave the machine to stand before you can repower it. I have seen the issue with 3 working power supplied and 2 cases, and am completely at a loss as to where to go next

  • Just Time May 11, 2007

    Basically mobo will not start once AC power has been lost, unless its left unplugged and disconnected from the psu for at least 1 hour.
    Additionally all the keyboard lights flash intermittently once power has been lost.

  • kawabuci Jul 07, 2008

    same like you


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  • Posted on May 11, 2007
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Joined: May 04, 2007

Hey mate smart PSU next time just unplug your power cable for about 5 secs plug it back in and try

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Related Questions:


Dell optiplex 990 flashing amber light. Will not start up. Removed and or unplugged everything that can be removed or unplugged. Nothing seems to work. Purchased new power. same issue.

optiplex comes in 3 or 4 case types, and matching different mobos.
gee golly. which is it?
i hear nothing,?
if you want to guess, just do so your self , your cash that%$$

want to do testing first, say so, diagnosis? guessing is your job.
if that is what you want to do. ?
  • first off, you push the power button and the 2 fans spin do they?
  • unstated by you this super key #1 fact.
  • the manual states powerlamp flash amber why did you not say which lamp LED flashes? page 73 in your manual.
  • the 4 diagnostic LED? or ? what? page 99 powerled blinks
  • Blinking ambe POWER LED light indicates a
    problem with the system board.
  • so there you have it main board issues, when you see that it means to strip the system down to minimum system to find shorted devices, all PCs do this, all things in a PC can in fact short at any time. (fate?) so we just unplug devices, DVD drive all HDD, all SSD,
  • then unplug the video card in th PCI slot, or any card in any PCI slot of any kind, does the blinking amber end and fans run now the PSU fan must run the CPU fan must blow. do they?
  • The ram sticks pulled , and tested 1 by 1, did you do that.
  • remove all usb devices just as precaution, most usb ports have there own regulators and do no allow overloading main PSU rails. ever, but we unplug all we can, see?
  • did you bench test the PSU first>? both? using the magic jumper check. see at link below.
here is PSU checks

in our shop we have load bank tester for all PSU.
that burn power, and fully load PSU, but most times we dont need it.(we also have noise checks for PSU, tools)

here is mobo bad checks.
ive no idea of this PC is factory stock or not?
some folks mix parts, put dell mobo in to alien case?
but here is all ways to mess up mother boards.

things not told by you.?
  1. is it still like dell made it new?
  2. are both fans dead, amazing I have to ask but are they? the fans must turn fast and actually blow air both,
  3. do you have things in PCI slots.?
  4. what wattage rating is the PSU? 200w? or 500w?
  5. ram tests (pulls and swaps)
  6. PSU bench testing? did you? with the jumper, and see fan spins and all rails to to spec voltage with any $20 dmm meter made.
did you do a coin cell reset.
remove all wires to MOBO, cept power button tiny wire conn.
remove COIN cell
push power button, this discharges all caps now.
and NVram is now erased,
now put mobo back online, power and all, and see thaT FANS RUN
AND BIOS SCREENS POP AND IF DO , select BIOS defaults now.

your RTC coin cell is 7 years old today, and is the end of life point.
so says the battery maker, consider a new one?
or measure it with DMM, 2.9v and less is bad or at the deathh knee of life. 3.3v is new voltage.

I can't get my HP COMPAQ presario SR2170NX to turn on. When I press the power button, nothing happens at all. No lights, no fan activity. No nothing. Is there any way to fix this?PLEASE HELP DESPERATE

True name is
Compaq Presario SR2170NX "Desktop" 2006 made? or older.
push power button for 10 seconds and release? yet, the intel reset.?
all batteries are no good that old. COIN CELL DEAD.its DUE !
and hdd bad.,psu dead, fans must blow.
1,2,3 cured.
if desperate get a shop to fix it, or find Hardware savvy geek?
lots of things (chiP) inside are DOE EOL now, zero support like sound
ECS made (defunct too) mobo

RC415ST-HM (Alhena5) (ECS is like Elvis,left the building)
a Pentium 4 relic. PENTIUM-D is best.

max ram 2BG (2X1G)
VISTA 32BIT.(jan 2007)

NOw THE CAUSEs OF RELIC ***** a list:
1: PSU BAD, bench test it ask.
PSU has 2 power cables to MOBO never just 1, 24 and 4 pin.
if not connected both the CPU is now dead.
4: GPU card problem remove it. use VGA main.
5: remove all sata and PCI devices.
6: test 1 DDR2 ram 1 at a time in slot 1

test the mobo with only 1 stick of ram and nothing else.
use the VGA jack and working monitor most this old too are DEAD.

2006 , year seen via Wayback Machine is this ( old)

Introducing Radeon™ Xpress 200 for Intel® Processors (View Demo)ATI's Radeon™ Xpress 200 chipset for Intel® Pentium® 4 processors and Intel® Celeron™ processors is built for the PCI Express® architecture and delivers leading graphics performance, bandwidth, and advanced functionality. With a built-in graphics processor derived from the Radeon X300, this chipset provides full support for Microsoft Windows XP Media Center Edition and offers high-performance graphics designed for value-oriented desktop PCs for the mainstream PC user.
100% DOA, EOL and zero support.!

seen here

end relic fix.

All lights flashing rapidly

Indicators, Codes, and Messages

Dell PowerEdge 1800 Systems Installation and Troubleshooting Guide


New motherboard GA-p67x-ud3-b3 no video on boot

  1. 1 x PCI Express x16 slot, running at x16 (PCIEX16)
    * For optimum performance, if only one PCI Express graphics card is to be installed, be sure to install it in the PCIEX16 slot.
  2. 1 x PCI Express x16 slot, running at x8 (PCIEX8)
    * The PCIEX8 slot shares bandwidth with the PCIEX16 slot. When the PCIEX8 slot is populated, the PCIEX16 slot will operate at up to x8 mode.
  3. 3 x PCI Express x1 slots
    (All PCI Express slots conform to PCI Express 2.0 standard.)
  4. 2 x PCI slots

I have a Dell PE2900 which is not starting. The (single) power supply has a solid green light when plugged in. When I press the on/off button, it turns green, but nothing happens; no post, no fans, no spin...

This doesnt' look like the motherboard right away. First I would try the unit with another power supply. Using a power supply tester may let you know that the unit can give power or turn on but does nto mean the PSU is able to work with a load.

Many time dell will still have the lights even though the PSU is bad. On the back of the unit when you hit the power button. There should be status messages etc that can tell you if the unit detects issues.

This manual:

will help you. Pay attention to the Power Indicator Codes and LCD Status Messages sections.

Newly built system will not power up!

It seems like you have bad MOBO. I recently ordered all the stuff to build 2 new systems. Built the first one, no power, just like yours. Moved everything to the 2nd MOBO, everything worked. I did a RMA on the DOA MOBO. Got the new one and it fired right up. Sometimes you just get bad stuff.

Please don't forget to rate this solution.


Bought a Nvidia Geforce 7800 GTX 256MB Graphics card

errrr.... do you mean the 6 pin pci-e power plug and lead that normally comes off your Power supply?

You can get converters leads that change the pinout of 5.35 HDD power to 6-pin pci-e but this is usually NOT RECOMMENDED for any GTX series of GeForce.

You usually need the dedicated PCI-E RAIL (with its own PCI-E lead/connector... or even better x 2 of them) on your power supply for these builds.

Once again.... i definately do not recommend converting one of your other power outputs to run a GTX. At best it will not work.... at worst (though unlikely) you may end up damaged your shiny new GFX card.

If you do not have a 6 pin PCI-E lead and plug running directly from your power supply to run this card.... you need one. Do you happen to know the model of your current PSU?

Installed GeForce 8500 GT PCI-E video card and pc will not turn on

If your mboard has a builtin video card you should configure that b4 u can use that add on card.

1. connect the add on card.
2. connect the monitor to the built in VGA.
3. start system and press "F2 or Delete" to go to bios setup.
4. on bios setup " refer to the manual on installing addon PCI express card".
you find it here:

or enlosed in the board.

After configuring your system restart and unplug in the wall outlet and then connect the monitor in the add on card.

Hope you find in order.

SG33G5 & Radeon x1950 pro 512mb

sg335g5 mb. only supports 385mb video memory

Problem with new Aerocool Zero Db 620W PSU

plug it directly into the wall dont use power bar or check for 120 / 220 volt switch
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