Factory aging test DSi teardown

It seems like a lot of old Nxxxxxxo factory equipment has been leaking out recently.
I don't know if it's a good thing or a bad thing, it could mean a lot of stuff has already been destroyed.
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This is something I got a few days ago, a blue DSi used for aging tests. Unlike the retail DSi, its blue is glossy.
I've also seen DSis with glossy black and deep blue shells before. I think they’re all used for factory testing.
(Click the image to view original)
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It doesn't have a battery cover, it probably uses an external power source.
Judging from the wear on the plastic of the charging plug, it has been plugged and unplugged countless times, and it might also have been used for testing charging plugs.
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There's a sticker on the shell saying '镜头已取' (cameras removed), both cameras have been removed.
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This DSi only has the retail version of PRE_IMPORT (factory firmware) installed, the Stage 2 version is v2262-8067 (prod).
- After turning on the DSi, both screens stay white.
- If a DS/DSi game cartridge is inserted into the DSi, the game will automatically start when the DSi is turned on.
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The product.log in NAND only recorded two types of test content, DELETE and AGING. Does this mean there's still an undiscovered TWL EVA DELETE?
There are 281 AGING records, with a total duration of 388 hours, 26 minutes, and 35 seconds (about 16.18 days).
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Here's the teardown process, super boring, nothing fun in it.
- board C/TWL-CPU-01
- Wireless card DWM-W015
- eMMC produced in 2008/08.
- CPU console ID 08A17731********, it uses retail firmware, it should be 'CPU TWL' (I'm too lazy to open it up and check)
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