How to securely fix the dowel in a loose wall

I fixed it somehow on the wall, TV mount. The wall was found to be very loose and the dowels did not want to burst in the drilled hole. With each new attempt, I increased either the length of the dowel or its diameter. Result = 0. When screwing in the self-tapping screw, the dowel turned. What kind of reliability can we talk about here?

TV is heavy! Wouldn't want to drop it!

So we had to come up with a more efficient way.

So… what did I do…

Initially, I wanted to "drive" the dowel with a diameter of 8mm. As a result of unsuccessful attempts, I had to switch to 10-ku.

In the end I had to:

• drill a hole to a diameter of 12 mm;
• find a disposable syringe with a volume of 10 ml in the first-aid kit;

• having drawn water into the syringe, slightly moisten the inner cavity of the hole
• cut off the front wall of the syringe;
• dilute alabaster, to a state of 15% sour cream;
• draw the resulting solution into a syringe;
• insert the syringe into the hole (10 entered well, almost to the very bottom of the hole);
• slowly removing the syringe from the hole, squeezed the solution into the "emptiness";
• without wasting a second, he pressed the dowel into the unhardened alabaster;
• the dowel went in easily, because. the solution was very thin, but if it had already been thicker by that time, it would have been necessary to help a little with a hammer;
• after that, he made himself a cup of coffee;
• after drinking coffee, after 15 minutes … screwed all the screws.

The result - the TV has been hanging for several years ... and it seems that it is not going to fall. I hope my advice helps you someday :)