2 Posts
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4109
August 7th, 2022 06:00
Vostro 5468 won’t turn on and LED blinking 3 amber, 5 white
Hi, I just replaced my thermal paste and suddenly my laptop won’t turn on and blink, 3 amber light and 5 white light. When referring to Vostro 5468 manual, the code wasn’t exist. But when referring to Dell website, it says the code is power sequence failure. What did go wrong and how to solve this issue?
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ejn63
10 Elder
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28.6K Posts
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August 7th, 2022 07:00
It's a power rail failure -- open up the system and verify that you haven't spread heatsink compound on the mainboard. If you have, carefully clean it with alcohol and allow it to dry. Then reassemble and see if the system will then POST. If it still won't, you're in need of a replacement system board.
danielshore
2 Posts
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August 12th, 2022 10:00
Yup, I think you're right that a trace of Thermal paste got into another component on the motherboard. After I read your suggestion, I immediately remove all the thermal paste on the motherboard including on the processor, graphics card and any traces of thermal paste on any components. I reapply the thermal paste on processor and graphics card carefully and the laptop works again.