My screen is showing no signal and do not start

Hi @chotubhondudon

Try a full power refresh and check if that resolves the problem.

Here’s the procedure:

• Disconnect the power to the PSU and then open the case and remove the RTC coin cell battery from its holder on the motherboard - see p.106 Item #9 of the owner manual for the location of the RTC coin cell battery on the motherboard

When the battery is out, check its voltage. If it is <2.5V DC or if the battery is >4-5 years old, replace it. The battery model number is stamped on the battery e.g. CR2032 etc.

• Press and hold the Power On button operated for a full 30 seconds and then release it.
• Reinsert the RTC coin cell battery, (+ve on top as marked on the battery), close the case, reconnect power to the PSU and try to start it.

If it starts, there may be a message about the date and time being incorrect. This is normal as the above procedure has reset the BIOS back to its factory defaults. Once the date and time have been adjusted, the message won't appear the next time the PC is started. Any user defined BIOS settings that have been altered by you to suit your particular operating requirements will need to be changed back also.