Soundbar SAMSUNG HW-K450 - The set does not connect via BT to Subwoffer

The bar works correctly on all wired inputs and you can also connect your smartphone via BT.
However, I cannot connect the subwoofer to the pairing procedure several times, with no result.
And here I have an insurmountable problem. How do I get to the loudspeaker and electronics located in the subwoofer enclosure? The only thing that can be unscrewed from the outside is 4 legs and 1 screw for the 230V socket (by unscrewing it the socket would fall inside.)
Shining the flashlight inward through the ventilation holes looks like glued joints of the cabinet halves, the same as the front speaker grille.
(but it makes no sense that it would be force-stripped) Anyone knows ...
Link to soundbar description:
https://saturn.pl/rtv-i-telewizory/soundbar-s...partner&utm_term=samsung&utm_campaign=samsung

Hard stuff. It depends on how much the casing is glued together.

You can gently with a feeling that the casing does not crack, tap the place of gluing the casing with a small hammer, then with a sharp knife in the place of gluing, drive through the casing and you will be able to get inside.

You can once again look carefully at the soundbar to see if there are hidden screws somewhere to get inside.

What I have described is that you must do it very carefully, slowly and patiently. Nothing by force.

Before you start destroying the subwoofer, because it almost always ends its demolition - strong glue, weak plastic and chipboard.
What do the LEDs on the subie indicate?
Just because the beam works "correctly" does not mean that it is functional.
The NETWORK-WIRELESS AUDIO communication module or the tape connecting this module may be damaged.
Another case (which I recently had):
1. Blue LED flashes - no communication,
- repeated pairing did not give results until it got it - blue led is steady
but no sound from suba - silence.
2. NETWORK-WIRELESS AUDIO replacement - worse - only red led no sub reaction.
3. tape replacement + NETWORK-WIRELESS AUDIO solved the problem.
Conclusions:
Before you start to undress something that is glued and susceptible to damage you need to be sure that the fault is right there.
The price of undivided suba more than PLN 350.

I once got a repair kit, someone was already undressing

https://support-us.samsung.com/cyber/popup/if...29379&modelcode=HW-F450/ZA&modelname=HW-F450&

This instruction helped connect the first time

Unfortunately, these BT connection procedures and other similar instructions were carried out several times and nothing helped always at the end of the procedure, the blue diode was lit, which according to the instructions means pairing the devices but after 5 seconds the red diode lights up and blinks with the red in an even slow rhythm. The speaker beam easily plays through all connections, HDMI, USB and even connects to BT with a smartphone, i.e. it's good.
Finally, I called the authorized Samsung service and there it was explained to me that this is a fairly common fault, the only repair is the replacement of the subwoofer because its design prevents demolition and getting into electronics, and the entire repair will be limited to buying a new sub for PLN 227 gross.
Thank you all for your interest.
I close the topic
Ps.
By the way it's sk ....... two to dump such a sub into the garbage after all, you could easily add some wired input to it and open it anyway because I denied it.