My sony vpl px40 standby light is red - Sony Office Equipment & Supplies

See the indicator section on page 49 of manual

VPL-SX125/VPL-SW125 (sony.com)

and indicators section on page 20 of this manual

VPL-DX147-DX127-DW127 (sony.com)

Bit of a common problem with Sony projectors of the era that they often had problems with fading and/or cracking of one or more the LCD panels - especially the blue ones for some reason, leading to the type of problem you are experiencing. No point in swapping components either as they will both have similar faults - although replacing an LCD in a video projector is almost impossible without the manufacturers jigs to mechanically align them afterwards anyway...

1,remove the screws on the back. (only 1-2 screws)
2,force the cover(white) from the back
any questions, feel free to ask me
have a nice day!
Jerry Lampdeng Limited

Hello
The Lamp Model number to your Sony projector is [LMP-P260]. to replace the almp, proceedings are there on page (38) of its user manual. If you haven't its user manual with you now, send your email address to me by Fixya comment box. I've the user manual to your projector in PDF format, and I'll send a copy of it to you by return mail. OK.

A Flashing Red ON/STANDBY LED means one of the following
2 Flashes - The internal temprature is high. Check the air holes are unobstructed.
4 Flashes - The fan is broken
6 Flashes - The internal electrical system has failed.
There is no entry in the manual for 12 red flashes.

press the following buttons on the control panel in less than five seconds. RESET, LEFT ARROW, RIGHT ARROW, ENTER

Turn Power Off by pressing power button on projector, it is now in standby.
If projector is plugged in but not in power On mode or not showing picture, it calls standby.

HI there

This might only be a dusty lens on the inside. But it could also be a faulty Mainboard or LCD's.

Take it to a Service Centre and ask them to check it out for you. They normally quote first and then repair if you give them a go-ahead , you've got nothing to lose.

check the Lamp unit. If Lamp is ok then check the ballast unit

I had the same problem and called Sony, they just said to keep trying what the manual says to do, but make sure the unit is in standby mode. I tried in powered mode and in standby mode many times and it did not work. Then I tried again the next day when the unit had been in standby mode for an extended time period. I hit the four buttons like the manual said, all four in quick succession. I also tried the four buttons in many different sequences from what the manual said. When I powered back up the lamp timer was set to zero, finally! I think having the unit in standby for an extended time was the key. The Sony rep really emphasized the need for the unit to be in standby.