Hi iv got a dell c640 when i swith it on the power

hi,

i had two c640 with the same problem..
there is just one solution..
you have to replace an ic chip..
this one is getting to hot.
it's the 45 chip.
underneath the motherboard.
yep, you have to take your lap apart
it's a maxim chip..
i did that , replaced the chip with a defect c610 maxim chip and now the 2 c640's are in the air for mionhs now..

good luck

have a look a www.asklaptopfreak.com for the details

sounds like a motherboard port. remove the battery and try to power it on again with the AC adapter. If same issue, try another AC adapter, try removing the hard disk and DVD drive if available, and test it again.. If no luck, request for a motherboard replacement if within warranty, otherwise, you will have to contact their sales support to purchase a replacement board