HT4 - constant red light. What the ....

[vxooxv]

I have 3 amps. All HT-4s.

One has a constant red light. We will call that amp 1.

Power blocks reads at least 13 volts. Consistent with the other 2. So it's not the main power source. Connected to incoming ground just to make sure.

I took the power block out of amp 1 that brings in pos and neg and put in amp 2. Blue light - all good.

I then took out both channel blocks where 1 includes REM and put in amp 2. Blue light. All good.

Both fuses on amp 1 also are good.

I disconnected RCA inputs on amp 1. Still red.

Powered on / off blah blah blah. Still red.

At lake. No subs. Everything worked last weekend. All I did was turn off the blue seas switch and charge the batteries like I do every weekend.

I ain't got no time for this. Any thoughts?

@Odin

 

[Bill D]

Disconnect the speaker wires to that amp and see if it clears. I'm thinking it detects a short and is in protection mode.

 

[vxooxv]

It is in protection mode. The ht4 has a block for channel 1 and 2 and another for 3 and 4 that also has the rem. I took both of those out and connected to another amp which stayed blue. Not in protection mode. I figured that was easier than taking the wires or if the block itself. I believe that has the same affect ehhh?

 

[vxooxv]

Messed with it again this am.

Removed RCA inputs. Protect mode.
Removed 1 bridged subs output. Protect Mode
Removed the other bridged sub. Protect mode.

Only thing that remains is REM / pos + neg. protect mode.

REM is on a switch where 1 wire is split into 3 for each amp. REM from another amp swapped into problem amp. Protect mode.

Took REM wire from problem amp to good amp. No protect.

Took pos / neg block from problem amp into working amp. No protect.

Both fuses are fine.

I'm showing 12.8 volts on all amp leads.

My only conclusion is the amp mysteriously took a dump while sitting in the driveway while the batteries were charging.

@David Analog any suggestions?