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ThunderMTL
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Message 1 of 2
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Flag Post

Z400 Workstation - Suddenly stopped

HP Recommended
Z400
Microsoft Windows 7 (64-bit)

Hello,

 

One of our computer suddenly stopped working. Unfortunately, the user did not take notice of the potential LED or Beep error and simply turned off the PC and disconnected the power cable. Upon reconnection and trying to reboot PC:

 

- the PSU, CPU and case fan start spinning and stop immediately;

 

- the Power button blinks blue once;

 

- we can hear power being sent to the internal speaker, but no specific error message;   

 

We ordered a replacement power supply and disconnected/removed every possible components but the behavior is still the same.

 

Did anyone encountered anaything similar with these models ?

 

Thanks

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gabornico
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Message 2 of 2
Flag Post
HP Recommended

Sounds like the system board died.

Since you already removed all components, there's no need for further testing.

Ebay is a good source for spare parts, just make sure you get the later revision which has six memory slots.

 

There's a chance that the other power supply still works fine.

From my personal exprience, the Delta DPS-475CB 1A is a rock solid PSU, I use this model in different machines.

Besides that, it has a built in self test feature.

Here's how to use it:

 

1. unplug the mains voltage

2. disconnect harddisk drives, system board, dvd, everything

3. remove the power supply from the case and put it on a table (this is not a must, but can make things more comfortable)

4. connect the power cable

 

There's a green LED inside the box, it is located behind the 92mm fan.

You will hear a click, now the fan should start spinning and the LED should light up.

If you see the green light, this means everything is fine.

You can now unplug the power cable.

 

 

 

 

 

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