I had to replace the dead LCD in my quadraverb and used a donor pot (aka variable resistor) from an old non functional CDROM drive (the volume pot for the headphone jack). Had to install the pot because the LCD (salvaged from a dead laser printer) had a problem with the backlight getting too bright/hot and making the LCD go black. So far its been working for a couple of years.
Perish the thought of one of my beloved 2101's dying one day. There really isn't much out there to replace it and having to relearn an interface, ick.
"Never put off till tomorrow what you can ignore entirely."
To: gsp-2101@yahoogroups.com
From: me@...
Date: Mon, 4 Apr 2011 02:49:57 +0000
Subject: [gsp-2101] Display on the Blink
I want to share an experience I had last week with one of my 2101s. The green display did not illuminate when I powered up. If I tapped the display it would either come on for a while then go off or it would flicker.
Anything to avoid shipping my 2101 back to DigiTech for repair. I took off the top cover (we all know how to do that, don't we?) and detached the front panel from the main chassis. No sign of any loose wires.
The display is mounted on a green circuit board (PCB). Just to the left of the display (looking from the front) is a small white-colored pot (variable resistor). It's located between the display and the hole for the power switch. I assume this pot alters the display brightness or contrast. I noted the original orientation of the pot and then used a small jeweller's flat-head screwdriver to spin it a few times back and forth.
After restoring the pot to its approximate original position, the display now works. No flickering, no repair bill.
One final note. You might be able to twiddle (a technical term for adjust) this pot with a small screwdriver without having to detach the front panel from the main chassis.
I hope this saves someone else from down time and some repair expense.
Anything to avoid shipping my 2101 back to DigiTech for repair. I took off the top cover (we all know how to do that, don't we?) and detached the front panel from the main chassis. No sign of any loose wires.
The display is mounted on a green circuit board (PCB). Just to the left of the display (looking from the front) is a small white-colored pot (variable resistor). It's located between the display and the hole for the power switch. I assume this pot alters the display brightness or contrast. I noted the original orientation of the pot and then used a small jeweller's flat-head screwdriver to spin it a few times back and forth.
After restoring the pot to its approximate original position, the display now works. No flickering, no repair bill.
One final note. You might be able to twiddle (a technical term for adjust) this pot with a small screwdriver without having to detach the front panel from the main chassis.
I hope this saves someone else from down time and some repair expense.