looking at a friend's laptop that won't charge battery.  % does not move past 18 or 19.  got a new battery, no difference.  machine used to run with just the ac power plug only.

bought a new I/O board and have the following situations and outcimes:

1. battery in only, no power lights at all and won't run.

2. battery in, ac power on.  all i get is 3 amber and 1 blinking white light. will not power on.

3. battery out, AC power in.  no system power light.  pushing power button on/off gives repeating white power light every 5 seconds.  laptop will not power on.

4. removed battery and ac power, held power button to dissipate electrical charge, no difference with ac wall plug (same result as #3).

5 AC wall plug has always tested at 119v AC In, 19.51v DC out.

Ideas?  none of the suggestions I read in the forums have worked.