Member Avatar for pwdcj

Hi, I recently bought a new computer n installed a DWL-520+ wireless card. It works great, connects to the network and Internet etc- but as soon as i turn on my other pc with wireless connection (which is closer to the router), the signal 'flicks' on and off about every 2-6 seconds, not letting it establish a connection. Also it 'kicks' off my others computers' wireless at times also

HELP NEEDED!! I have no idea! thanks in advance

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A concise expert note tied to the thread: is right to look at the router, but the phrase "full duplex" can be misleading for Wi‑Fi. Wireless links are shared (half‑duplex) and access points are designed to handle multiple clients. Intermittent connection behavior when a second wireless PC powers on is usually caused by driver/firmware bugs, adapter power/IP conflicts, or radio/handshake issues — not a fundamental single‑client limit.

Prioritized troubleshooting checklist (perform in order):

  • Reproduce cleanly: bring up only one wireless client, then power the second on while watching connection LEDs and router logs.
  • Update firmware and drivers: get the latest router/AP firmware and the wireless adapter drivers from the manufacturers, apply them after backing up settings, and do firmware updates over a wired link when possible.
  • Isolate hardware vs OS: test the suspect adapter in a different machine, or swap adapters between machines to see if the problem follows the card.
  • Check IP/DHCP: run ipconfig /all (Windows) on both machines to detect duplicate or static IPs; check the AP/DHCP pool size and lease behavior. Temporarily assign distinct static IPs to rule out conflicts.
  • Power and adapter settings: disable adapter power‑saving (Device Manager -> adapter -> Power Management) and select a high performance power plan.
  • Wireless settings: try a single radio mode (b/g only), switch to a non‑overlapping channel (1/6/11 on 2.4 GHz), and briefly disable encryption to rule out handshake issues (re‑enable immediately afterward).
  • Logs and captures: examine AP logs for deauth/disassociate events; if comfortable, capture frames with Wireshark to spot repeated deauths or malformed frames.

If none of the above isolates the fault, factory‑reset the AP after backing up config or consider replacing the suspect adapter.

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Member Avatar for ebarrera

what kind of router do you have? model and all.

somerouters do not support full duplex for multiple connections

Member Avatar for pwdcj

what kind of router do you have? model and all.

somerouters do not support full duplex for multiple connections

Thank you so much for your help- I have a d-link DI-624+ router

However, I have used this same card with the same router on my previous computer and it worked fine then- i remember having the same problem with the card back when i was setting up my previous computer- but somehow i figured out how to get it working... but now i cant haha

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