i am trying to solve problem on my nec versa laptop... it does´nt charge anymore... before the poblem there was wierd (crickety) noise from the upper left side where is DC 19V connector...
- especially when battery were weared off, an then connected to power supply (like it was too much to charge the battery, and supply current for laptop to work at the same time)
so i yesterday i left laptop on to download something( no noise) g but when i returned home it was off and there is repeatly that same noisa but now not constant - rather 1sec ON - 1sec OFF frequency
i couldnt turn it on either - on power suplly or battery...
i dismantle the laptop and connect it to supply to determine exact from where noise is comming...
it is one of eight same smd component square-d shape length 7mm, width
4,2 mm height app. 1,5 mm... and it have side line mark for orientation, and a two rows text...in the mether of fact - 8 comopnents are marked on 2-ways (four of each on the each side of PCB motherboard)
150 3OLQ d - this one is noisy (know wich one)& i am not sure maybe 30LQ dand other four are
150 3NUT di am not sure what they are... cappacitor, some diode, or inductors...
maybe some help... (links to www with info about identifying such stuff)
afterward i concluded that, that is capacitor 15 µF and replaced it with a non tantalum cap 15 µF 25v - no noise but laptop wont turn on, or charge battery...
here is picture of simmilar element marked 100 - can you tell me with certainty what it is? and what is the value (marked 100, or 150) ???