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flash your bios. there is a jumper next to your cmos battery (looks like a giant watch batter) and move the black jumper over one to cover the not covered pin and athe already (middle) covered pin. also you can try and remove the cmos battery for about 2 minutes (COMPUTER OFF) and put it back on it will reset your bios back to factory settings (english). If that still resets it back to Taiwanese its under the 2nd to last tab for language. or the very first tab i cannot recall which exact bios this pc has. you can also try downloading a bios update first. from ibms website
First, you will need to check the voltages of the 2 batteries & make sure they are identical. Both batteries should have identical voltages. The only difference should be that 12-cell batteries last longer than 6-cell batteries.
Next, take the battery off the laptop, & using a dry tooth brush, scrub in between the fins of the battery connector on the motherboard & on the battery it self, then put the battery back into the laptop & try again.
And last, if none of this works, then try updating the BIOS. Sometimes this solves problems with the battery not being detected. You can download the BIOS for your model from Gateway support site. You have to download the BIOS for your exact laptop model. I would also recommend to do some research on the Internet before updating the BIOS to see if somebody else encountered the same problem on the same laptop model, & whether it was solved by flashing the BIOS or not. Beware not to turn the power off while flashing the BIOS, or you might render your laptop unusable.
This problem can be caused by several things. First, are the memory chips exactly identical (brand, type, size, etc.)? If not, that will definitely cause the problem. Second, how many memory slots are there? If you have four, check the manual and make sure you're putting the memory in the correct slots. Some Mobo's require that you put chips in slots A1 and B1 and not A1 and A2. Also, some Mobo's have DDR slots and DDR2 slots, so make sure you're putting the right kind of memory into the proper slots. Some people fudge the memory by putting 400 mhz memory into slower slots, and that works one chip at a time - but if you install a second, identical chip, the system will fail. If all else fails and you've met these conditions, check the type of memory to be sure of the proper fit (use manufacturer's recommended brands and numbers) or try a different chip in the second slot. One chip could be bad.