White LED Strip (2m, 1A) Dimming, Warming Up, Uneven Lighting: Power Supply Issue or Wear?

Hello, I have a 2 m white led strip in bed. Original power supply attached to the bed 1A. Recently, a problem appeared because the tape lights up weakly (i.e. a few LEDs light up the rest dimly and others barely) and it heats up quite like this (it is not hot but warm).
Unfortunately, I noticed it recently and did not pay attention whether it happened overnight or in the long run. I have already connected the power supply from both sides and nothing. Once the cable came out of the tape but I soldered and everything worked.
The tape is less than 2 years old. But it has been shining all night for the past three months.

Could this be a wear signal already ?? But shouldn't the diodes lose power evenly then ??

I wonder what could be the problem because I bought a new tape and wants to connect it to this power supply but I do not want the situation to happen again. In a short time.
And is there sense with less than 2m hooked on both sides ??

You can't see but always something

If they are heating up, maybe a damaged resistor, which means that the diodes want to take as much voltage as they can, because nothing limits them

SuwiN7 wrote:

Could this be a wear signal already ??

It's time for tape.
These diodes are of different random quality and mainly the temperature damages these diodes and the power supply must be checked

Approx. I will check the power supply with a meter and if it is ok I will mount a new tape.
The power supply should show these 12w on the meter connected not ??

It should show 12V, without connecting the tape

tomrom1985 wrote:

maybe a broken resistor

Mostly a damaged resistor has a break.
And the photo shows that some of them glow normally, and some barely-barely; and such (barely-barely) lighting is a symptom of a damaged diode.

HD-VIDEO wrote:

It should show 12V, without connecting the tape

I meant to check the power if it has these 1A (12W) only if I show it on the meter without load.
I will not buy the meter until Friday.
#Questions of the novice hehe

And there is no current on the power supply? Or power?

Hello, it's rather tape consumption, I have aquarium lighting on leds and after a few years of use, the symptoms were identical. best regards

The voltage should be measured with and without lighting. Then you can say something about the power supply. The tape, as you can see (at the right voltage) does not shine well ?! Signs of diode wear. Cheap Chinese has the diode of the lowest quality. I suggest you add a few zlotys and buy some branded ones.

LED strips are best glued to something well conductive, e.g. aluminum flat bar, or a special profile for LED strips. During work, heat is emitted and if it is not dissipated well, it will accelerate the death of diodes. This is especially true for new, more powerful tapes. Branded tape costs more and it is a pity that it would fall due to savings on cooling.

There are also LED strips, or rather LED strips on an aluminum substrate, stronger diodes are installed there and they are properly cooled.

The tape was added to the bed and you know how the savings on the material look (the price was not low, you could expect something better). Thanks to everyone for the answers and valuable advice. The new tape has come a bit to redo the old layout and I think it will be okay. best regards