Fluke 8024B

as received

Nonsense readings.

Nonsense readings.

Solvent has welded the kickstand to the case.

Other than solvent, not too bad.

Signs of solvent damage to plastic in many places.

Some buttons look rough, must have been sanded.

Flexible connector damaged by solvent.

LCD support welded to case.

More solvent damage.

Where the LCD support was pried off.

Solvent has welded the LCD in place.

Leaky cap damage.

Two electrolytics total, both have leaked.

Cap leakage, not too bad.

Cleaned up.

Other electrolytic site cleaned up.

Not too good for a 22uF/16V cap.

That&#039;s not good either.  Both caps replaced.

Surprised the LCD works at all.

Main chip looks OK.

Remove U14 (quad CMOS switch) to decouple ADC input. It floats around as expected.

Shorting ADC input (black probe connected to COM jack) produces correct zero reading.

Injecting a 100mV DC signal straight into ADC.

The red probe has the 100mV signal on it. Excellent. ADC is working and by the looks of it, still calibrated.

Cut lead coming in from top board to isolate source of leakage current.

Negative offset of 0.33V appears on the input jacks. Fault is between here and the cut track.

After days of looking, found that one of the flex connector runs leaked on the order of 20 to 30 meg-ohms to the adjacent conductor.

On a whim, reversed the connector, hoping that the leakage wouldn&#039;t make as much difference at the new location.  It worked!

Ohms OK too.

Extreme button repair commencing.

Hole for switch stem filled up with putty and scrap plastic.

More scrap plastic for side mold.

JB Weld epoxy poured in.

Some shaping required.

Not too bad.

I could always use a manicure.

Peas in a pod.

At this angle, LCD is a bleedin&#039; mess.

Looks reasonable from straight-on.

Not too bad for almost being destroyed by solvent.  Peak hold circuit a bit wonky though, needs work.