Dell Insperion B120 several years old. Never used for internet, never ran well on battery alone, mostly used it with adaptor plug. Kept it dusted out, & defraged properly, now it won't power up--all black, no lights. I took it apart, dusted, removed dusted & replaced battery. When I put everything back, it powered up for a moment or two then back to all black. Could this be as simple as buying a new battery for it, if I do & it doesn't work do stores take them back? Please advise & thanks!!
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