If model number is correct the akai is a samsung; from the rear with the cover removed are three rather large black lens (one for each picture tube) that point upwards.
If the set has not been serviced for a long time clean the lens with a lens cloth or a paper towel with glass cleaner sprayed on it.
These are the light source for your picture and if dusty the picture will be darker and dull looking.
SD TECH
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