Radio not working, Power but no Display. Non Nav

[Greg25]

I have a 2004 Gx470 with a Non Nav Radio.  Has CD, Tape, and a Pioneer Amp.   The radio gets power, but the display is blank and no sound.  Trying to trouble shoot if this could be the amp, or the radio itself.  I have checked both Radio1 and Radio2 fuses.  Has anyone else had this issue?

Edited May 26 by Greg25

[RX400h06]

5 hours ago, Greg25 said:

I have a 2004 Gx470 with a Non Nav Radio.  Has CD, Tape, and a Pioneer Amp.   The radio gets power, but the display is blank and no sound.  Trying to trouble shoot if this could be the amp, or the radio itself.  I have checked both Radio1 and Radio2 fuses.  Has anyone else had this issue?

It sounds like you're dealing with a frustrating issue! Since your radio is getting power but has no display or sound, the problem could be with either the head unit or the Pioneer amplifier. Here are a few troubleshooting steps to help narrow it down:

1. Check for loose connections – Inspect the wiring harness behind the radio and amp to ensure nothing has come loose.
2. Test the amplifier – If possible, try bypassing the amp by connecting a speaker directly to the head unit. If sound comes through, the amp may be faulty.
3. Look for signs of failure – Some Lexus owners have reported issues with the amp overheating or failing over time.
4. Inspect for blown capacitors – If you’re comfortable opening the radio, check for swollen or leaking capacitors, which can cause display and audio failures.
5. Consult Lexus forums – Other GX470 owners have discussed similar issues here and shared troubleshooting guides like this one.

If you want a visual guide, you might find this YouTube video helpful.