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Old 09-12-2018, 02:04 PM   #1
GA Novice
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Default Oven LCD display dim and uneven

I have an 18 year old Frigidaire range (combo oven and cooktop). The display (part number 316080102, no longer in production) is dim and uneven. It looks worse than in the picture. The red letters in the upper right of the display are particularly dim, this is where the temperature is displayed. I opened up the control panel and the caps do not have obvious tell tale signs of failure. There are 4 caps - 100uf 50v, two 470uf 16v and 3300uf 16v. Do you think the caps are bad (and if so which one), or is this a sign the LCD display is bad? Thanks for your thoughts. Pictures below.
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Old 09-12-2018, 02:13 PM   #2
R_J
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Default Re: Oven LCD display dim and uneven

I would suspect the 50 volt caps would be for the display voltage which shouild be around 25-30 volts dc. or it could be the 3300 which is likely the main filter cap. Without a cap/esr meter to check them, I would just replace all of them, if that does'nt fix it it could be just the age of the display itself

Last edited by R_J; 09-12-2018 at 02:16 PM..
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Old 09-12-2018, 06:14 PM   #3
Heihachi_73
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Default Re: Oven LCD display dim and uneven

Yeah, the cap date codes are from the year 2000, it's a safe bet that they starting to dry out, especially being next to that transformer and most likely operating 24/7. They look like Elna caps, which are a good brand, although any caps can fail when their time is up.

The display looks like a VFD (vacuum fluorescent display) rather than LCD or LED. They can also go dim over the years, although I had seen 1980s car dashboards where the VFD is still in good condition, as well as VCRs and stereo equipment of similar vintage.
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Old 09-12-2018, 06:55 PM   #4
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Default Re: Oven LCD display dim and uneven

Thanks for the comments. I am going to change the caps and see if that does it. Also, I realized this is in the wrong forum, it should be in the Other Wierd Devices, if a mod could move this there, thanks.
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