Lenovo Ideacentre Horizon screen won't turn on but power button is on.

My lenovo ideacentre horizon 27 won't start up and the screen won't turn on. The power button is on (lid up) and the fan is on but when I press the power button the computer won't start. I have tried checking the cord, pressing the power button for 10 seconds but no luck! Please help!

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Hi, were you able to fix this issue ? I have exactly the same problem starting y'day. Thanks


non...unfortunately not. he is no in the sky :) ..i bought a new all in one from lenovo.


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Hi @voken,

Disconnect the following from the computer and see if it at least powers on:

Any external devices connected to the computer, including the mouse.

Disconnect the HDD and the ODD (Optical disc drive) from the motherboard, both power and data.

Remove the RAM modules from their slots.

Try to turn on the computer.

Hopefully it will start and you will get beeps indicating failure to POST due to no RAM.

If it still doesn't start

Check that the following are connected properly:

On/Off Switch connector

System Board Power Supply connectors

Microprocessor connections

Here is a link to the service manual. (tick the I'm not a robot checkbox , click Get Manual in Green box, pass the verification test and then click on the Download PDF or View in Browser above the Save to your collection box

It shows the necessary pre-requisite steps and the procedures to remove and replace the various components.

If it still doesn't start you may have a motherboard problem.

Hopefully this is of some help

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Jess estará eternamente agradecido.
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