I have a Dell CPI D300XT with a faulty inverter board. Looking at the board there is a black mark at the SMT capacitor directly after the fuse F1 and the fuse F1 has blown. I cannot se any other damage and I am not sure if the cap has blown or not Is there anyway of identifying the value of the capacitor so I can replace it ? There are no markings at all and I do not have a capacitance meter. The capacitor looks like it goes from the fuse directly to ground so would replacing it with a 100nf cap be ok ? Also if I do that and plug it to the laptop can it damage anything downstream to the laptop if I am wrong ? My idea was : 1. Short F1. 2. Power up board - watch for sparks or smoke. 3. If no sparks/smoke measure voltage at inverter output. 3. If output looks ok then connect backlight. 4. If not good output then replace cap with 100nf and repeat. What are the dangers to the rest of the laptop of trying this ? Any other advice ? Thanks, Mars
well how should i say it u can't place a lower capacitor on a higer capacitor for example if u have a 6 farad(car amp capacitor) and release it on a 12 volt 300Uf it can cause an explosion (in this example it'll turn this into a frag nade) so yea.... p.s this is an example try loking the the label that is around the capacitor
