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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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BD411H / 4407 IC
i'm trying to fix a laptop that let the magic smoke out when a loose screw
in the case shorted something out. it's an Acer Aspire 1350, model # MS2159... if that's any use, the blown chip is an 8 pin surface mount, (U43 on the board) it's mounted right after the DC input connector from the + terminal, i can make out 4407 clearly, and then all i can see is 1H, the rest is obliterated, looking on the board, near the battery are a couple more ic's with 4407 top numbers, and they go BD411H, i have been trying to search for this ic, but cant seem to find all the numbers to match, i assume it's a power regulator chip or something like that, i'm in the UK, so have tried RS and maplins, the latter are useless, just a toy shop now it seems, RS list some similar, but i cant be sure it's the right thing, and the one that was closest mentioned a 5 volt max input, the laptop has 19 volts from the psu to that connector, which goes straight to the ic. anyone got any ideas what i can use to replace this ic? |
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