My marantz sound takes 10 minutes to come on - Proscan PS27500 27" TV

No, it is a Surround Sound Receiver for taking television signal, or a signal from another device and amplifying it to multiple speakers..

https://www.google.com/search?q=Marantz+SR+68

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Moved you from cars to Maranze
there is 1982 sections here. PM420
if all inputs fail the PA amp is bad
check fuses
check if speak wires are shorted. or speakers.
if not that ,parts inside gave out.
39 years old, caps in side are bad (best statistics)

Diconnect from power. Tip it on end and spray the button with Switch Cleaner (NOT WD40!). Operate it a few times and spray again. Leave it 15 minutes and switch it back on

https://www.marantz.com/en-ca/product/av-receivers/sr7400

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sounds like it is overheating but I know of no fix as i have never seen one

Hello Nate, if you can connect an amplifier to the front channels of your Marantz, to reinforce the sound
For that you have to take the audio signal from the PreOut RCA connections on the back of the SR8002, L output and R output and these 2 signals are sent to the input of your booster amplifier
I send you the link of the user manual and on page 10 you can see the back panel of your Marantz and identified with the number 12, the "PreOut" exits area, there are located the exits that I mentioned
I hope you can listen with more presence to the front channels of your audio system
Greetings Franco Dosil


Hola Nate, si puedes conectar un amplificador a los canales frontales de tu Marantz, para reforzar el sonido
Para eso tienes que tomar la se?al de audio de las conexiones RCA de PreOut en la parte posterior del SR8002, salida L y salida R y estas 2 se?ales las env?as a la entrada de tu amplificador de refuerzo
Te env?o el link del manual de usuario y en la pagina 10 podr?s observar el panel posterior de tu Marantz e identificado con el numero 12, el area de salidas "PreOut", ah? est?n ubicadas las salidas que te he mencionado
Espero que puedas escuchar con mas presencia los canales frontales de tu sistema de audio
Saludos Franco Dosil
https://www.manualslib.com/products/Marantz-Sr8002-15515.html

Fuzz and pop sounds like bad capacitor or blown transistor.
Best to take it back to service center.
While there, throw your toys out of the cot, explaining that they did a 'b*m' job.

Video processing section circuit should be troubleshooted. Seek tech support.

Service manuals are available from the following site:

http://www.superscopetechnologies.com/service/parts.shtml

Dan