In pcb 800041 when using usb connection I can load T2 to ram without problem but when I convert the original usb to sata connection with MRT or dolphin conversion board (4 capacitors and 1 crystal removed) I have decrypted access to user lba and can do other actions but if I want to upload T2 to ram MRT failed.
In 800069 it successfully uploaded to ram with simple conversion to sata (just wires and sata connector).
In 810035 it successfully uploaded to ram with MRT or dolphin conversion board even without removing 4 capacitors.
The question is whether this is also the case with other DR tools or is it just a limitation of MRT?
If anyone can confirm under what conditions exactly it is possible to upload T2 to ram on 800041 pcb (of course, if it's only possible through usb connection, that's a big problem).
Another question, is it possible to upload T2 to ram without power off and on which is what I see MRT doing?

You don't need to remove any capacitors or crystal. You just need to short the Reset* pin to ground.

Locating the Reset* pin on USB-SATA bridge ICs:
https://www.hddoracle.com/viewtopic.php?f=59&t=3381&p=24481#p24481

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A backup a day keeps DR away.

It's good to know that short the Reset* pin to ground can be done instead of removing capacitors, but before I spend time in micro soldering is there any chance that this will solve the error of loading T2 to ram on 800041 pcbs in MRT with conversion boards?

No.

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A backup a day keeps DR away.

Set sata speed SATA1.

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Angel Data Recovery

It also happens when I set to sata1 mode.
Only in 800041 pcb and failed only to load T2 with conversion usb to sata board.
Is that also the case in pc3k?

MR8S , They are very sensitive. Sata wires should be as short as possible and firmly soldered. SATA1 set in mod 02

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Angel Data Recovery

How to change this in mod 02 ?

That's why I use these conversion usb to sata boards they are very stable.
When I change sata speed within MRT settings to SATA1 the problem still exists.
Do you suggest I change it manually (maybe MRT doesn't change anything)?
Which bits to change in module 02?

ISTR that the big square PCB has a SATA redriver IC, so it should be stable. However, I don't see anything like that on the other PCB. Can you show us photos of each side of the smaller PCB?

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A backup a day keeps DR away.

https://www.hddheadtools.com/wp-content/uploads/2023/09/800069-USB-SATA-Adapter-Smart-1-scaled.jpg

I think that square IC is a SATA redriver. The other IC is probably a 3.3V LDO regulator. If so, then this should be a stable setup.

If you can tell us the IC markings, that would clear things up.

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A backup a day keeps DR away.

The manufacturer destroyed the IC markings in all my units.
There are two letters or numbers at the top is a semicircl.
On the regulator it is written AMS1117 3.3.

The "+" mark at pin #1 identifies it as a Maxim IC, possibly this SATA redriver (MAX4952B):

https://www.mouser.com/datasheet/2/609/MAX4952B-3469998.pdf

I don't understand why the manufacturer would deface the chip markings. Seems very petty to me.

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A backup a day keeps DR away.

Maybe it happens during manufacturer installation, but it's also deleted in the picture you uploaded and in all my units that I bought at different times.
In any case, it seems that the error will be on all converted boards and probably also with soldering wires.
The questions are why all the operations in 800041 work correctly and only the load of T2 fail (it only works with usb connection), and if it's also happens with pc3k?
I'm surprised no one has brought up this problem until now,800041 pcb it's been around for many years.