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UPS's can fail. &nbsp;Try plugging the server directly into a wall outlet. &nbsp;Does the UPS itself have power? &nbsp;Has it popped its own built-in circuit breaker? &nbsp;AC wall outlet breaker ok?
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UPS's can fail.  Try plugging the server directly into a wall outlet.  Does the UPS itself have power?  Has it popped its own built-in circuit breaker?  AC wall outlet breaker ok?

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1.) Maybe. Some supplies have an indicator light on the outside. Your motherboard could be dependent on working components prior to powering on. <br />
<br />
2.) There are too many variables to prepare for. Just maintain a good backup for worst case scenarios.
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1.) Maybe. Some supplies have an indicator light on the outside. Your motherboard could be dependent on working components prior to powering on.

2.) There are too many variables to prepare for. Just maintain a good backup for worst case scenarios.

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Try unplugging the power cable/s from the server, then put them back in.
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Try unplugging the power cable/s from the server, then put them back in.

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1. What Manuf. &amp;&nbsp;Model # of the hardware?<br />
2. Try eliminating UPS<br />
3. Check cables for tightness
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1. What Manuf. & Model # of the hardware?
2. Try eliminating UPS
3. Check cables for tightness

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Thanks to you all. It was the power supply. I replaced it and inmediate backups. Everything else working.
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Thanks to you all. It was the power supply. I replaced it and inmediate backups. Everything else working.

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<div class="content wysiwyg-content">
Hello,<br />
My win 2008 R2 server was working properly until a few hours. The electricity suply was normal and there is a small UPS system for 15 min. All the network continues working but the server will not turn on.<br />
<br />
1) Is this the power suply box inside the server ? and what is the best way to test it?<br />
2) What can I do to prevent this kind of problem?<br />
<br />
Best regards,
</div>
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Hello,
My win 2008 R2 server was working properly until a few hours. The electricity suply was normal and there is a small UPS system for 15 min. All the network continues working but the server will not turn on.

1) Is this the power suply box inside the server ? and what is the best way to test it?
2) What can I do to prevent this kind of problem?

Best regards,

my server all of a suden does not turn on

Servers are computing devices that are similar to desktop computers in that they have the same basic components, but are significantly different in size, configuration and purpose. Servers are usually accessed over a network, and many run unattended, without a computer monitor, input device, audio hardware or USB interfaces. Many servers do not have a graphical user interface (GUI), and are configured and managed remotely. Servers typically include hardware redundancy such as dual power supplies, RAID disk systems, and ECC memory, along with extensive pre-boot memory testing and verification. Critical components might be hot swappable, and to guard against overheating, servers might have more powerful fans or use water cooling.

Server Hardware

Components are those devices that are internal to a computer -- the PC boards, the central processor (CPU), the memory (RAM), disk and video controllers and so on.

Components

Microsoft hardware includes mice, keyboards, webcams, headsets, display adapters, gaming consoles (including the Xbox One) and the Microsoft Surface family of tablets