DS411 slim bricked

Hi,
I have a ds411 slim. I got power outage middle of the firmware update. Now it has blue flashing light on power on.
I did some research I saw i will need a serial converter for a console access.
I have that:
RS232-TTL-M, Features Power supply: 3V~5.5V (with ESD protection); Supports SP3232, DB9, UART ports
Voltage Range (V): 3V~5.5V (with ESD protection) image from it: Image
And i also have that:
PL2303TA USB-TTL Image
And a raspberry pi 4, and a multimeter.

How can i do the unbricking?
Also there is anything what i need to have for it?

Krisztian12005,

> How can i do the unbricking?
> Also there is anything what i need to have for it?

As I recalled here is where we left off:

https://forum.doozan.com/read.php?2,135749,136022#msg-136022

So there is nothing comming out of the serial console, no matter what serial converter you used?

=======

Here is a successful kwboot run on the DS411slim (by Nefarious19):

https://forum.doozan.com/read.php?2,135749,135752#msg-135752

-bodhi
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Edited 2 time(s). Last edit at 04/01/2024 02:23PM by bodhi.

bodhi,

Sorry for the new topic creating. I've just started again the unbricking.
Yes, it doesnt came out anything on the console no matter what converter am I using. Also all the two converters are brand new.
Also I measured the CMOS battery only a few millivolt missing. Battery original 3.00v, measured 2.98v.
I used this picture as a basis for wiring.
Image's page



Edited 3 time(s). Last edit at 04/01/2024 07:04PM by Krisztian12005.

Quote

PL2303TA USB-TTL
Image

This looks good. Don't connect the 5V, only connect RX to TX, TX to RX, and GND to GND.

Quote

I used this picture as a basis for wiring.
Image's page

The serial pinouts above is good. Note: pay attention to the Pin 1 marking. Many Synology NAS boxes have different orientation (sometime the header is upside down, sometime it's right side up). The marking could also be an arrow pointing to Pin 1.

-bodhi
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Edited 1 time(s). Last edit at 04/02/2024 02:36PM by bodhi.

Hi,
Little update:
I took out my multimeter and i started to measure.
I measured the pins on the board and thats what i got:
1 3.3v
2 gnd
3 not gnd, 0v
4 3v - 3.1v
5 not gnd, 0v
6 3.2v - 3.1v

Can it be the
pin 1 3.3v
2 gnd
the 3 or 5 tx
and 4 or 6 rx

Here is the picture for the Synology header. Does it look the same on your board? Note the pin 1 marking. On a different Synology board, instead of the bold White corner, it is an arrow ^.

As long as you don't connect power source from the adapter, it is safe to try swapping wires/pins. But for Synology boxes, 2,4,6 are the pins to use. I have not seen or heard any other pinouts for Synology NAS.

-bodhi
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