PCB failures (Such as Samsung PCB BF41-00106A) 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 Samsung PCB BF41-00106A failures are listed below, along with tips for replacing & repairing.

Samsung PCB BF41-00106A Failures:

Q: Samsung HD400LD – remove TVS

Hi! I’d like to ask your advice The power supply (12 V and 5 V) was swapped on my Samsung 400 GB PATA HDD After that it does not spin up any more I’ve bought a similar PCB (same model number/serial on both PCBs – BF41-00106A, rev 08, Trident), replaced them and now the HDD spins up, gives a knocking (?) sound, then powers down after 2-3 sec I’ve searched and read through this forum, and found that removing the +5V TVS _may_ help I’ve also read that since +5V rail got +12V,

Replacement Samsung PCB BF41-00106A:

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:

• Samsung HD400LD PCB Board BF41-00106A
• Samsung PCB Board BF41-00106A