i have a WD1600AAJB which the report from Atola shows that there is an issue with the pcb. the 12V doesn't work. shall i change the pcb is there another way? (maybe a TVS chip or similar) do i just swap pcb?
thank you in advance

The ROM on your pcb has adaptives data on it. If you are using the Atola and do not understand how to work with the PCB might I made a suggestion that you might consider to our source these drives until you know more about DR work. It is not bad if you can not understand and handle the work that out sourcing is possible. Plus here on the forum there is thousands of post on TVS and you can read any and all of them and understand where your problem is on this issue and easily fix it there for you. But if this is not your HDD and a clients I would suggest to really make sure your diagnostic is correct before moving forward on this one.

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Iorana Haraharaini

Check D4 and R64.

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A backup a day keeps DR away.

i uploaded an image. are these marked the TVS which need to be removed.
i couldnt find the D4 R64

thank you for your help

Component #1 (Q1) is a transistor. It is probably the pass transistor in a linear regulator. Its metal tab and middle pin (collector) are connected to +5V. The emitter pin would be the output, possibly +3.3V.

Component #2 (D3), marked as "5L", is the 5V TVS diode.

Component #3 (D4), marked as "13L", is the 12V TVS diode.

R67 is the topmost of the two zero-ohm resistors. Although its circuit reference is not visible, R64 is directly below it.

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A backup a day keeps DR away.

you mean the #4?
i will start by removing the 12V TVS chip and the zero-ohm resistors.
if there is no result i will swap pcb which i have.
i have to swap the original EEPROM chip though.
could you mark the EEPROM chip for me.
thanks for your help

Measure the resistances of each component. If a zero-ohm resistor measures 0 ohms, then leave it alone, otherwise flow a blob of solder between its ends.

If a TVS diode measures 0 ohms, then cut it out.

I don't see any flash memory or EEPROM. The only 8-pin chip is U4, but it appears to be buffering the jumper I/O pins.

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A backup a day keeps DR away.

i haven't tried to remove the 12V TVS yet.
i just tried to swap PCB's (same model same DCM)
but when i do that it starts clicking.
that's why i was wondering if there is a EEPROM chip to put to the Donor PCB
thanks again

I am sorry but how can you invest in such expensive material and not even understand the makings of a PCB board and what to do with it. You do not know what or where your ROM is or even if you have a Marvel chip on your PCB to store your adaptive data in. I sure hope this is your personal drive and not one for a client. I can not see how you can do DR work when you have no idea how to even move adaptive data from one PCB to another. You say you have the Atola there for you and if you do then this was a rather expensive investment if you can not understand how to use this tool or even work with a PCB.

Please take some classes, hire someone to teach you, practice on some junk drives, read, research, and learn what you need to know before attenpting to do DR work for others. DR work is not just working with good drives that have some problems in MBR or partitions. It means being able to do all the work on them. Such as working wtth heads, platter swaps, stuck motors, SA damage, media damage, PCB replacement or repair. If you are asking now on a simple case then I fear you need a lot of time to catch up on what is taking place here and do a lot of research on this one. I would not relay on someones answer who is not even associated with DR work to help me fix a clients drive. Maybe the person who is supplying you with answer will do more damage to your HDD than good. I see here that not one DR tech has even assisted you in answering to your questions on this one. We have a hobbist who sits here to answer you for this problem.

I do not mean to be crytical to you and your attempts to try and learn DR work. But in doing so just to buy some tools is not going to magically recover drives that are physically broken. That is why people bring us the drives in the first place. They could not find a simple DIY solution for this one and they needed to relay on an expert to do it for them. I wonder what your client would think if he knew you did not have a clue as to where to even begin on repairing his drive and you were seeking help from a hobbist on a forum to give you the answers you are looking for.

May I suggest that you stop now in what you are diong before you really damage this drive beyond repair or should I say what you are capitable of doing by yourself. I wish that if people who want to do this type of work they would not practice on a drive that was not their own. I am sure you did not invest in this Atola for personal use. I am sure you will not take my advice in this one and will continue on with what you are attempting to do. I wish you luck and do not know if a hobbist will allow you the answer necessary to fix your pcb and get the drive up and running again for you. Good luck anyway on this one.

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Iorana Haraharaini

Sorry, I forgot to say that #4 is R67.

R64 is directly below it.

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A backup a day keeps DR away.

@poehere
First of all i didn't declare my self as a Data Recovery expert. i am new to DR trying to learn and get better.
there is a starting point for everyone. in this forum there people who need help and people who offer help.
exchanging ideas and suggesting solutions is the general idea of the forum.
i believe that the posts i have made so far, don't offence anyone in any manner. if so please let me know.
i am really thankful that some people in the forum answers to newbie's questions.

No you have not posted to offend anyone here. Yes it is true we all started at the beginning when doing this work. But when we start we do not start right off on clients drives that they entrust to us to do the work and get back their data on them. Normally to start off you should purchase a set of drives from Ebay and find out what is wrong with them and see if you can repair them. Go to your local PC store and ask them if they have any drievs they are throwing away. Practice - practice - and reseach then practice some more. Once you are confident in knowing what you can and can diagnose a drive failure then take on the challenge of recovering drives from clients who need back their data and have entrusted their data to you to get it back fror them. That is all I am saying to you. It is not a shame to outsource work. For example here it is hard to get in donor drives and rather expensive to boot from here to get them. So if I can save the client some money and can not get a drive here to do the work for me I would rather out source this work and have it done than fight with the problems of customs and things here on the islands. I do not feel this one is wrong I feel it is good for me and business becasue it is a win win for me to do this one. So I would consider to start off with some logical recoveries and things that are easier to do and build up your skills and then go after the harder jobs for you. It is not a shame to out source some of your work especially if you are not sure what you are doing. Think about it. Your clients will be happy that you got back their data and you do not have to let them know that you took these measures. That is what I am saying to you on this one.

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Iorana Haraharaini

... And it can save a lot of troubles just in case the customer is a professional troublemaker