My son tells me his 17" Tyris (marked F179, also T701DB) powers off to dead "every couple of days" but usually "comes back on when I whack it". First I heard about this was last night when it would no longer respond to being beaten. The thing is on at least 8 hours a day. The Tyris works fine for me, but I didn't wait 16 hours for a failure. Swapped it out for a previously repaired Acer, and today opened the Tyris. Inside found PS board DCAC40A4 (UP0401UB12Q07) with video board GBM Group LM1X02N_MB Ver 1.0 P/N MLM00M10110). (What is it with every board having two types of part numbers????) The first board has all LTEC caps and the latter is all Capxon, but none of them look bad on either board.
From the symptoms it sounds like it might be a cracked solder joint, probably on the PS, will pull that board and resolder it when I have time. Is it worth replacing the caps on either board while it is disassembled? I don't know much about LTECs but the CapXon's have a pretty poor reputation. For the video card the CapXons are 7X (47uF 16V), 2X (100uF 16V), 2X (470uF 16V), 1X (220uF 16V). For the PS board the LTECs are 2X (680uF 16V), 1X (220uF 25V), 1X (10uF 50V).
From the symptoms it sounds like it might be a cracked solder joint, probably on the PS, will pull that board and resolder it when I have time. Is it worth replacing the caps on either board while it is disassembled? I don't know much about LTECs but the CapXon's have a pretty poor reputation. For the video card the CapXons are 7X (47uF 16V), 2X (100uF 16V), 2X (470uF 16V), 1X (220uF 16V). For the PS board the LTECs are 2X (680uF 16V), 1X (220uF 25V), 1X (10uF 50V).
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