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Repair and disassembly information for the jp.ik LEAP T304, an education laptop aimed at young students.

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Why is my computer not powering on?

When you press the ON button, the blue led turns on for a few seconds and then turns off, and the pc doesn't start

답변되었습니다! 답변 보기 저도 같은 문제를 겪고 있습니다

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Hi @pedrolopes69523

Does it do this with the charger connected, you didn't say?

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

Here’s the procedure:

Disconnect the charger, disconnect the main battery from the motherboard, (you don't have to remove the main battery, simply disconnect it), disconnect the RTC coin cell battery and then press and hold the laptop’s Power on button for 30 seconds to reset the BIOS back to default settings in case it was corrupted for some reason, preventing a normal start

Whilst the coin cell RTC battery is out if you have a DMM (digital multimeter) check it voltage. If it is <2.5V DC replace it. I can't find a replacement RTC battery for the laptop online so hopefully there may be some information on the battery itself, that may help to locate it.

Reconnect the RTC battery, reconnect the main battery, re-assemble the laptop, connect the charger and check if it turns on OK.

If it does turn on OK, there may be a message about the date and time being incorrect. This is normal as the BIOS has been reset back to its factory default settings. Once the date and time have been corrected, the message won't appear again the next time the laptop is started. Also any user definable BIOS settings that were changed by you to suit whatever operating requirements you had will need to be changed back again as well.

Here’s the ifixit jp.ik Leap T304 Battery Replacement Replacement that may help. The RTC coin cell battery can be seen in the image in Step.6, taped to the main battery, lower right side of the image.

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Hi @jayeff

Thank you for your help and the excelent tutorial.

Today I tested the charger, it was ok. I had everything ready to start the procedure but before I tried one more time to turn the pc on... And you know what? It started whitout any problems, and it's working fine.

I still don't know what the problem was, but for now it sems to be working without any issues.

Thank you.

Best regards,

Pedro Lopes.

@pedrolopes69523

Thanks for the feedback

In case you didn't have the charger connected before when it didn't start, start the laptop and then create a battery report just to check on the condition of the battery in the laptop.

Once you have the report, compare the Design Capacity value versus the Full Charge Capacity value as shown in the report. For a good battery the values should be nearly the same.

You can work out as a percentage the condition of the battery by using the formula: Full Charge Capacity value x 100 ÷ Design Capacity value.

If the battery is <35% you may want to consider buying a new battery for the laptop. Failing batteries can cause strange, intermittent things to happen, i.e. sometimes it's OK other times not.

This is just to eliminate the possibility that's all ;-)

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