New power supply no power
The power supply in my e-machine T6540 computer got very noisy (surprise surprise)
So I purchased a super quite one to replace it (ZALMAN ZM500-HP).
The original Main Board Power Connector was a 20 pin there is a 24 pin socket but only
the right 20 pins were used.
The ZM500-HP has a 20 + 4 cable "Mainboard Power Connector".
There is also a 4 pin square socket on the mother board that was black black yellow yellow.
There is a equivalent connector in the hardwired cable set, the manual seys its PCI Express1
power connector.
It's a easy swap but when I plugged it in I do not get any power and the LEDs do not light.
The e-machine power supply was a DELTA Electronics DPS- 300AB -15A.
The pinout on the power connector appears to be the same the at least the blank pin is the same.
So where do i start? Any suggestions?
Thanks for the help,
Ralph
So I purchased a super quite one to replace it (ZALMAN ZM500-HP).
The original Main Board Power Connector was a 20 pin there is a 24 pin socket but only
the right 20 pins were used.
The ZM500-HP has a 20 + 4 cable "Mainboard Power Connector".
There is also a 4 pin square socket on the mother board that was black black yellow yellow.
There is a equivalent connector in the hardwired cable set, the manual seys its PCI Express1
power connector.
It's a easy swap but when I plugged it in I do not get any power and the LEDs do not light.
The e-machine power supply was a DELTA Electronics DPS- 300AB -15A.
The pinout on the power connector appears to be the same the at least the blank pin is the same.
So where do i start? Any suggestions?
Thanks for the help,
Ralph
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Power supplies are very sensitive too. A not cable that is not properly plugged in is enough to make it refuse to start.
My modular power supply refused initially to start because a modular SATA cable was not firmly inserted.
The computer does only need 2 or 3 connectors (3 if your graphics card needs additional power from the power supply) to power it on but in order to use it, you'll have to connect optical drives and hard drives of course.
My modular power supply refused initially to start because a modular SATA cable was not firmly inserted.
The computer does only need 2 or 3 connectors (3 if your graphics card needs additional power from the power supply) to power it on but in order to use it, you'll have to connect optical drives and hard drives of course.
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ASKER
I have all of the cables connected correctly.
I'am using the 20 pin main board cable and the 4 pin CPU1 (square) cable. While the motherboard has a 24 pin mainboard connector there was a sticker over the first 2 (4) pins to the left and only a 20 pin cable connector from the power supply.
The e-machine power supply "claimed " to be Intel ATX12v compliant.
e-machine was notorious for weak power supplies has anyone done a power supply
swap (upgrade) on a e-machine? In other word is there something about the computer
being a e-machine that is causing the problem? Is there a propritary thing happening?
Thanks for the replies,
Ralph
I'am using the 20 pin main board cable and the 4 pin CPU1 (square) cable. While the motherboard has a 24 pin mainboard connector there was a sticker over the first 2 (4) pins to the left and only a 20 pin cable connector from the power supply.
The e-machine power supply "claimed " to be Intel ATX12v compliant.
e-machine was notorious for weak power supplies has anyone done a power supply
swap (upgrade) on a e-machine? In other word is there something about the computer
being a e-machine that is causing the problem? Is there a propritary thing happening?
Thanks for the replies,
Ralph
did you try the old one?
ASKER
The old power supply works fine. I was replacing it because it was noisy.
Ralph
Ralph
yes - but try it NOW to see if it still boots the system...
The e-machine power supply "claimed " to be Intel ATX12v compliant.
---> This only means it has the 2x2 pin CPU connector.
e-machine was notorious for weak power supplies has anyone done a power supply.
-> Bestec 250w used in emachines (and some others) had a design flaw on the +5vsb rail that would cause a catastrophic failure of the PSU and often would damage the motherboard.
-> The Bestec 300w has a weak +5vsb rail that is prone to failure but not so dramatically [or nearly as often] as the 250w models.
Delta and Zalman PSU's are not known to have those problems although it is possible for an odd one here and there to be defective. [Just as any other part will have a few duds come off the assembly line.]
swap (upgrade) on a e-machine? In other word is there something about the computer
-> Aside from the quality problems the power supplies are industry standard ATX12v type.
being a e-machine that is causing the problem? Is there a proprietary thing happening?
-> Nope. See last one.
~~~
There is not a problem with connecting all 24 pins if they are there.
The PSU's are wired for either-or 20-pin and 24-pin to accommodate different motherboards.
- The "blocking sticker" is a safety device that is there so someone connecting a 20-pin PSU to a 24-pin motherboard does not plug it in at the wrong end of the motherboard connector.
Both the 24 and 20 pin arrangements still require using the 2x2-pin ATX12v [CPU power] connector.
.
---> This only means it has the 2x2 pin CPU connector.
e-machine was notorious for weak power supplies has anyone done a power supply.
-> Bestec 250w used in emachines (and some others) had a design flaw on the +5vsb rail that would cause a catastrophic failure of the PSU and often would damage the motherboard.
-> The Bestec 300w has a weak +5vsb rail that is prone to failure but not so dramatically [or nearly as often] as the 250w models.
Delta and Zalman PSU's are not known to have those problems although it is possible for an odd one here and there to be defective. [Just as any other part will have a few duds come off the assembly line.]
swap (upgrade) on a e-machine? In other word is there something about the computer
-> Aside from the quality problems the power supplies are industry standard ATX12v type.
being a e-machine that is causing the problem? Is there a proprietary thing happening?
-> Nope. See last one.
~~~
There is not a problem with connecting all 24 pins if they are there.
The PSU's are wired for either-or 20-pin and 24-pin to accommodate different motherboards.
- The "blocking sticker" is a safety device that is there so someone connecting a 20-pin PSU to a 24-pin motherboard does not plug it in at the wrong end of the motherboard connector.
Both the 24 and 20 pin arrangements still require using the 2x2-pin ATX12v [CPU power] connector.
.
ASKER
I replaced the new power supply with the old one and it works, tada!
So I guess I know how to hook it up correctly.
Now what?
I ordered a Power Supply tester but it is couple of days off.
I have one other computer and I could swap it's power supply with the new one but it is my
work computer and I do need to get some work done.
Ralph
So I guess I know how to hook it up correctly.
Now what?
I ordered a Power Supply tester but it is couple of days off.
I have one other computer and I could swap it's power supply with the new one but it is my
work computer and I do need to get some work done.
Ralph
>> I replaced the new power supply with the old one and it works, tada! << this backs up my opinion that the new one could be bad DOA...
ASKER
Thanks everybody for the input. I re-installed the old power supply and that worked.
So I let it set overnight and put in the new power supply. It works.
Absolutely nothing different then yesterday but today it works.
Thanks again,
Ralph
So I let it set overnight and put in the new power supply. It works.
Absolutely nothing different then yesterday but today it works.
Thanks again,
Ralph
ASKER
Thanks for the reply,
Ralph