It's possible that one of the network access points is transmitting too high a power level, generating the four bars and high dBm reading you observed at your location. This also explains why your client is trying to connect to that specific access point. But... does the access point detect your client? WiFi communication is bidirectional, and both your client and the access point should be transmitting signals at a similar power level. How can you check if this condition is met?
With NETSCOUT's AirCheck G2, you can quickly check the signal level of the access point at the user's location and then the signal level of the user's client at the access point. Typically, the signal level of the user's client should be the highest on the network at the nearest access point. If you measure the signal level of the user's client at that access point's location, the signal level should be similar. If you detect a signal level that is too low (for example, below -80 dBm) or no signal at all, you have located the problem.
