Psu

Computer Forum Power Supplies and UPS's
1

Is it possible for a PSU to power up the fans, yet still be defective sometimes, and not produce enough power to boot the machine?
HDD Seagate ST340016A 40GB + Radeon 7000 32MB VGA (PCI) Card
All PCI empty
[have a lot of problems, trying to eliminate 1 by 1]

ANY ADVICE APPRECIATED

HEC 250AR-PT 250W
Total output: 250w
Combined output: 3.3v + 5v: 150w
Max Current: +3.3v=20A, +5v=25A, +12v=13A
Safety Certificates: TUV, CE, NEMKO, CB, UL, CSA
EMC: Complies with CISPR 22 230 VAC operation.
Intel V.2.03 ATX Specification
Size: H 86mm, W 150mm, D 140mm

SiS 655FX
P4S55FX+

CPU

  • Socket 478, Intel Prescott Intel Pentium 4 Celeron
  • FSB 800MHz/533MHz

Chipset

  • SiS 655FX+964L, Supports Hyper-Threading Technology

Memory

  • Supports Dual Channel Technology
  • 4 x DDR DIMM slots
  • DDR 400/333/266
2

yes

as your system is a low spec, that PSU may power it, however, try using a simple cheap multimeter to check the output voltages both with the system assembled & switched on and with all equipment disconnected from the PSU

and that PSU has a really low output on the 12V+ rail (13A)

what are the results of the multimeter test (both connected & disconnected)

BTW you may find that 1 or more outputs from the PSU is 0 (zero)

3

Hi, Thanks a million for the reply.
I’l get a multimeter and post the results
:slight_smile: Thanks

4

Hey donkey.

I was jsut wondering if there were any conventions for the number of amps going through teh rails in your average PSU?

5

That information should be listed on the sticker on the side of the PSU.

If a PSU doesn’t provide enough juice to get the system going completely, a common sign is the fans spinning, but the motherboard not POSTing. You don’t have a super high-powered system, but it’s quite possible the PSU, while a fine unit, is simply incapable of providing adequate power for this system.

6

23/08/07

Hi

PSU

Couldn’t get a Multimeter
[live in Spain – closed for August, the country that is]
Took Power supply from another machine
No Branding, just MODEL LPT2
[Googled, nothing]
300 Watt
Sounds healthy
Turns the fans
Good draught from PSU Fan

Graphics Card
Took from another PC

RAM
Took ddr400 from another machine

HDD
Put into another machine as Slave
Run Chkdsk /r
Comp Mgt > Disk Management
Healthy NFTS 4 Partitions
Copied file to it – No problem
Seemed AOK

BIOS
Managed to get into BIOS sometimes
[though most times it went to black screen]
Loaded defaults
Changed Boot Order Floppy/CD/Disk 0
Disabled SATA

POST
Found Boot OK on IDE 0
Operating System missing

Install Operating System W2K from CD Boot
Run straight through to ‘Starting Windows 2000
Just hung

Enable SATA in BIOS
POST No Sata or Pata found
Boot from CD
F6 Raid disk from ASRock Website
Installed from Floppy
Run straight through to ‘Starting Windows 2000’
Just hung

Got back into BIOS
Changed setting from PCI to AGP
Rebooted
No Change
Found Boot OK on IDE 0
Operating System missing
Install Operating System W2K from CD Boot
Run straight through to ‘Starting Windows 2000
Just hung

Boot from Seagate Disk Wizard cd
[Downloaded from Seagate site]
Loads
Hangs after few minutes
[Progress bar to about 1/3]

NEXT STEP ??? not done yet
Put Hard Disk into another machine
Reformat to single Partition
Put Disk back into machine
Try to Install again
Getting Desperate

COMMENTS
When it is doing something, like starting Windows Setup
It goes like a rocket
No Display problems
Just wont do the rest.

SETTINGS OBSERVED
From BIOS
CPU Temp 44C
MB Temp 36C
Fan Speed 3148 to 3207

V Core [???] 1.574 to 1.590
+3.30v 3.307v
+5v 5.167v
+12v 12.580 to 12.645v

From POST
HDD
Cyl 19158
Head 16
Sector 255
Size 40 GB
LBA LBA
32Bit ON
Block Mode 16 Sec
PIO Mode 4
UDMA Mode 5

PCI Devices
On Board PCI Bridge
OB IDE
OB USB Controller IRQ 3
OB USB Contoller IRQ 5
Bridge VGA IRQ 11
OB Multimedia Device IRQ 10
OB USB Controller IRQ5
OB USB Controller IRQ5
OB Ethernet IRQ 5
There are no duplicates here, if I have listed it twice, it is because it was listed twice

When SATA is not disabled, it also shows Raid
But I did not get the IRQ for it

If it appears that I have listed some superfluous info here, it is because I think I am doing something silly
Or missing the obvious

I think I only have the CPU and the Motherboard left to go.
I am in the wilderness there.

I have an Emergency Boot CD that will give me a lot of Info about the computer, but a lot of it is over my head
However, if someone can think of a Question, il get the info.

I don’t expect miracles,
[I have started praying for them though]

I have tried everything I can think of
Any thoughts will be welcomed like fresh air on a thick smoggy day

Cheers
Kevin

7

as far as i can tell, your PSU is from a company called: Power Link International LPT2, i think this is their website

BTW: have you tried reseting the BIOS / CMOS, failing that, i would say it is probably the PSU