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Hi Deb! Thank you for your interest with our Best Buy essentials™ - 6' 2-Slot Non-Polarized Power Cord - Black (BE-HCL331). To further assist you with your inquiry, please check the shape of the power port of your Insignia 42" TV for compatibility, if it has a two-prong power input then this power cord is suitable for your needs. It is also important to note your television voltage requirements match with the power cord for safety purposes and device protection. For more information about our power cord, you can check the link below, and go to features and specifications. Angelica| Best Buy Essentials Support| https://www.bestbuy.com/site/best-buy-essentials-6-2-slot-non-polarized-power-cord-black/6458697.p?skuId=6458697
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