Seagate PCB 100475720 Failure

PCB failures (Such as Seagate PCB 100475720) affect thousands of hard drives every year and often result in permanent data loss. A hard drive may suddenly fail to power on, and a computer may not detect that it is plugged in. Some failed hard drives will also show up in computer BIOS with incorrect brand/model information. PCB failures can also cause physical issues such as read/write head failures, and many PCB failure symptoms overlap with the symptoms of other physical hard drive issues.

Some emails from customers of Seagate PCB 100475720 failures are listed below, along with tips for replacing & repairing.

Seagate PCB 100475720 Failures:

Q: Seagate ST3500320NS terminal

Hi, . Have ST3500320NS with firmware SN06, PCB: ZKAJ-7 ?100475720 ?Rev A, from terminal no response, like terminal turned off. Same PCB with firmware SN04 work with terminal. . PCB REV C with firmware SN06, terminal work ok too.. What shamanic techniques need to unlock terminal ? Unscrew pcb from motor, or chanell shortcut dont help . thx

Q: DiamondMax22 fw MX1A strange PCB – terminal log TetonST Boot

Hello, i’ve this DiamondMax22 STM3500320AS which has an inusual PCB 100475720, usually this kind of hdd have pcb 100466725 o Terminal log Rst 0x20M F3 T>/2 F3 2>Z LED000000CE FAddr00259C49 Rst 0x20M F3 T>/1 F3 1>N1 LED000000CE FAddr00289139 I swapped the pcb with 100466725 and did ROM transfer, log is the same But if i insulate both HDA and motor contacts, this is the log Bogus ISR Bogus ISR Bogus

Q: Where’s the fuse on this PCB?

HiI have a Seagate drive wich wont power up. The PCB is a 100475720.I don’t have any compatible PCB to test for now.I have checked TVS and they are OK. My doubt is: is there any fuse? Where is it?? ??… 125810.jpg … 125802.jpgThanks

Q: ES2 Seagate drives terminal lock

I have got 2 ES2 Seagate drives with model no. ST3250310NS and PCB 100475720 REV A. Out of which 1 is OK and 2 are bad. In case when I connect OK drive I get terminal command by clt Z, but when I connect bad drives I could not excess terminal command and it gives error LED0000…. PCB`s is ok. When I connect only pcb , status becomes ready otherwise the drive show busy only.I have tried to short the pins also but no success.Please help me what to do?

Replacement Seagate PCB 100475720:

To repair a failure board, the simple way is swapping the failure board with a replacement board. Donor boards on HardDriveParts.com are listed below:

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