VTSTech
Developer
Been working on this one for a bit with a CECH-3001B. The shotgun fix would be to just replace the entire sub-board. This would most likely repair the error unless it is another related motherboard component that connects to the subboard.
This is the subboard (KTE-001):
Reverse side (KTE-001):
I've read that "pulling the HDD during the update for a few seconds" can allow the update to progress past the error. I'm still investigating this, There is two confirmed reports of people succeeding with this however.
I've also read/seen that bridging two components together on the motherboard can revive the subboard, Here is an example of that (not mine), This is from a CECH-25XX
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Here is another (not mine) example of a bridge fix. (JSD-001)
CECH-3001B - I did manage to get this thing into Recovery Mode once to feed it a new update PUP. So it's likely trying to install HFW 484 or 485 (formatted hdd again gives recovery boot, def using 4.85.1 hfw)
38% not pulling HDD at all. pulling at 34% errors at 44%, pulling at 43% errors at 52% ....
New behavior Pulling at 31% 8002F107 (Verification Failure)
pull at 48% error at 58% 8002F1F9
pull at 28% error at 46% 8002F1F9
pull at 27% error at 51% 8002F1F9
around 30-34% there is a series of quick reads, only time HDD light 'blinks' in rhythm really. These appear to be hash checks (or it could be 2x Read/Write pair. Is 4 distinct blinks) pulling at this time causes verification error...
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hdd light on im assuming reading/writing to hdd, light off im assuming reading/writing to flash. Been pulling while light is off for about 3-4 sec. Maybe to screw this up in our favor need to pull while light is on. (Pretty sure it just reattempts the current read/write seq at that point)
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pull at 29% w\ light on. 8002F107
pull at 33% w\ light on. 8002F1F9
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The next time the HDD Led lights up after the rhythmic blinks is when the 8002F1F9 error happens.
Pulling during those blinks, gives long hdd led on reinsert (init/detect?) and then the sequence you interrupted repeats. then 8002F1F9 on next hdd led
HDD can only be removed for about 4 seconds before progress halts usually
Time from power button pushed/beep to install failure is 2m55s...
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Once I get a new battery for my multimeter I'll test the trace connected components see if i can find anything obviously not working. Haven't got the heatshield off the module yet -- eventually failing all else i will likely take the whole thing off and put on another.
These are directly under the subboard (KTE-001).
Resistance
Voltage (2 seem dead)

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