Device not turning on (display) but windows does (kind of)

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Kindle Fire HD 10 第7世代

タブレット/E-readerの第7世代Kindle Fire HD10の修理ガイドです。

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Matthias @matthias2788

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投稿日: 2020年5月12日

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Device not turning on (display) but windows does (kind of)

I bought this FireHD10 because I wanted to see if its just locked and needed a good charge and hold of the power button. Seems like that didnt do the trick. I already opened it up and checked all connections.

Now I tried to plug it into my computer and windows is making the “new usb device found” sound. But it also does the “usb device disconnected sound” 1-2 seconds later. This is going on forever. Detection and disconnection.

Does anybody have an idea whats going on? the display isnt turning on at all.

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Dan A+ @dancomptia 評価: 2.4千 4 2 1 · Answer 1 · 2020-05-12T09:59:09-07:00

Dan A+ @dancomptia

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投稿日: 2020年5月12日

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If you just bought your FireHD10 and the display is already not working, it may be best to return it.

If that is not the case, have you tried using all of the USB ports on your computer (if there is more than one port)? Does the same detect/disconnect problem occur with all the ports, or just one?

Have you tried using a different USB cable to connect the tablet to the computer? The cable may be the problem.

You might also try updating your computer’s USB port drivers. This can be done in the Device Manager utility. In the Device Manager window, look for the Universal Serial Bus controllers entry. There should be some sub-entries below it. Right-click each entry and select “Update driver” from the pop-up menus.

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I bought the tablet used and broken. So I knew from the seller it wont turn on but he couldnt tell me any details. It just went off one day and he couldnt turn it on since then, This is why I thought it could be a locked up device.

I tried different cables and ports and even PCs. Same behavior.

In the device manager of windows 10 it is shown as "MediaTek PreLoader USB VCOM (Android) before it disconnects again. Seems like the device is trying to boot but cant.

Matthias さんによる2020年5月12日

If the tablet won't turn on at all, perhaps a bad battery is to blame. You could try replacing it to see if that helps. The battery replacement steps are at the link below:

Kindle Fire HD 10 第7世代バッテリーの交換

Dan A+ さんによる2020年5月12日

I tried a known working battery and it still won't boot. Same behavior. It might be software brick or it is a hardware problem. For now this device seems unfixable to me.

Matthias さんによる2020年5月13日

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Kindle Fire HD 10 第7世代

Device not turning on (display) but windows does (kind of)

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