However, as AndyAka says in his comment, you can better buy a new one, knowing the specs. From China, these are very cheap anyway.

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EndNote files for paper “Using MRI to quantify skeletal muscles in Duchene Muscular Dystrophy: A systematic review Resonance Imaging Signals”

I have two LED stips salvaged from a LED TV. I only have these to LED strips and the ribbon cable that was connected to them from the TVs screen and not other PCB boards or components to help power the LEDs.

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I borrowed a multi meter and measured the continuity of the strip. It seems that a single strip of 72 leds are wired in 4 series sets of 18 Leds each. There was continuity between diodes 01 - 19 - 55 - 72.

I strongly recommend an adjustable supply (most supplies are adjustable) and to regulate the voltage to less than 54V (for example 50V or 52V if it's too dim) to be safe with temperature. Maybe a 48V supply would be enough if you can regulate it to 50V. (ask/check before buying)

J. Ji and Y. Jiraraksopakun, “Model-Based Simulation of Dynamic Magnetic Resonance Imaging Signals,” Biomedical Signal Processing and Control. V. 3(4), pp. 305-311, 2008.

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Not the best picture. But each connector has only 1 row of connectors. The connector has a single connector with a pair of (+) and (-) on the strip, and an un-used connector in the center (the cable has no wire there). Additionally what looks like single (+) and (-) exposed for soldering?.

Edit: I didn't see that you calculated for 2x72 leds or 8 series, so your calculation is correct. 2x36.72W You can buy two supplies of 1A each or one supply of 2A. Here is the calculation I did: 0.17A for each serie of 18 LEDs. Each serie being 54V (this is true), the power for each serie should be 0.17*54=9.18W. Four series in parallel would need 36.72W and a total of 4*0.17A=0.68A at 54V. You will need for this a 54V supply with at least 1A (You don't need twice as much, that's a rumour.)

J. X. Ji, J. B. Son, and S. Rane, “PULSAR: A MATLAB Toolbox for Parallel Magnetic Resonance Imaging Using Array Coils and Multiple Channel Receivers,” Concepts in Magnetic Resonance Part B: Magnetic Resonance Engineering, v.31B, n. 1, pp.24-36, 2007.

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The LED stips have various codes printed on them, but the code CL-550-072-V1-L and Google pointed me to this page whith what is seems the exact same model: https://eastern-star.en.made-in-china.com/product/UXyxNGmKYMYf/China-Es-Eled-063-Cl-5500-72V1-R-L-Eled-TV-Backlight-Use-for-Phi-Lips-Cl-55-Inch.html

I would appreciate if someone can help me figure out how to power these two LED strips. I have very little electrical experience. Most Google searches for Led strip calculation are based on the length of a strip, but these are not the normal led strips from a roll.

Actually this is really a lot, but 3 V is very low. You might even think about using some transformer from e.g. 24 V or 12 V to 3V and using a lower amperage.