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How to release stored charges


The computer is power on, but there is no display on the screen.


The above symptom may occur on the following systems:

All Idea desktops and laptops


There are many capacitors in the computer, which can store charges. Occasionally, stored charges cause the computer to not boot normally. The following steps will fix this problem.

1. For desktop, power off the computer, and unplug the power cable of the computer.

For laptop, power off the computer, unplug the adapter and remove the battery.

2. Press the power button 3-4 times; hold it for 1 second every time. Ensure that there is a 1-2 second interval in between every time.

3. Plug back the power cable and then power on the computer.

If the problem still exists, please contact your nearest Lenovo Help Center.


If you are unable to find what you are looking for, please do try the following options:
1. Lenovo Assisted Search
2. Product usage and general troubleshooting tips
3. Lenovo Support Forum
4. Technical Support Call Centre

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Alias ID : IN20091231-001
Document ID : HT062584
Legacy Document ID : 1264128043189
Last Updated :
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