The power supply might be failing or completely dead which will cause the computer to be unable to start. Check the troubleshooting page here: [[Troubleshooting HP Media Center 876x Desktop PC#Section_Bad_power_supply|Troubleshooting Page]]
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The power supply might be failing or completely nonfunctional which will cause the computer to be unable to start. If this is the case then you will need to replace the computer's power supply.
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Check the troubleshooting page here: [[Troubleshooting HP Media Center 876x Desktop PC#Section_Bad_power_supply|Troubleshooting Page]]
The power supply might be failing or completely dead which will cause the computer to be unable to start. Check the troubleshooting page here: [[Troubleshooting HP Media Center 876x Desktop PC#Section_Bad_power_supply|Troubleshooting Page]]