Comments on: Dull Display Problem Solved In AMIGO Patient Monitor Model MM1121 https://jestineyong.com/dull-display-problem-solved-in-amigo-patient-monitor-model-mm1121/ Semiconductors, Test Equipments, Circuit Board Troubleshooting, Electronic Repair Courses and Many More! Sun, 29 Mar 2026 13:07:53 +0000 hourly 1 https://wordpress.org/?v=5.4.19 By: Albert van Bemmelen https://jestineyong.com/dull-display-problem-solved-in-amigo-patient-monitor-model-mm1121/comment-page-1/#comment-457002 Sun, 29 Mar 2026 13:07:53 +0000 https://jestineyong.com/?p=37067#comment-457002 In reply to Albert van Bemmelen.

If I'm right the wider white connector has these wire inputs: Pin1+2 = Vcc, Pin3 =On/Off, Pin4 =Adj brightness, Pin5+6 = GND.
Something that also was in detail missing. And these led driver boards are often used as keyboard led drivers like the CA-133 module.

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]]> By: Albert van Bemmelen https://jestineyong.com/dull-display-problem-solved-in-amigo-patient-monitor-model-mm1121/comment-page-1/#comment-457000 Sun, 29 Mar 2026 11:06:56 +0000 https://jestineyong.com/?p=37067#comment-457000 In reply to Parasuraman S.

So that must be the JH-2T009 module of which one led driver connector was removed. This one here: https://nl.aliexpress.com/item/10000414406611.html
That was what I needed to know but only found after the extended browser Aliexpress photo search.

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]]> By: Parasuraman S https://jestineyong.com/dull-display-problem-solved-in-amigo-patient-monitor-model-mm1121/comment-page-1/#comment-456997 Sun, 29 Mar 2026 00:29:48 +0000 https://jestineyong.com/?p=37067#comment-456997 In reply to Mark J.

There are number of sets that I could not repair, a few of which I have already shared here. But the lessons learnt enrich our knowledge and confidence to surge ahead. Many thanks for your encouraging comments, dear Mark!

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]]> By: Parasuraman S https://jestineyong.com/dull-display-problem-solved-in-amigo-patient-monitor-model-mm1121/comment-page-1/#comment-456996 Sun, 29 Mar 2026 00:28:20 +0000 https://jestineyong.com/?p=37067#comment-456996 In reply to Yogesh Panchal.

Yes and it is not worth hunting for it. Many thanks, Yogesh Bai!

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]]> By: Parasuraman S https://jestineyong.com/dull-display-problem-solved-in-amigo-patient-monitor-model-mm1121/comment-page-1/#comment-456995 Sun, 29 Mar 2026 00:27:35 +0000 https://jestineyong.com/?p=37067#comment-456995 In reply to Albert van Bemmelen.

It is the same board, but new. That is all the difference, dear Albert!

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]]> By: Mark J https://jestineyong.com/dull-display-problem-solved-in-amigo-patient-monitor-model-mm1121/comment-page-1/#comment-456991 Sat, 28 Mar 2026 19:27:46 +0000 https://jestineyong.com/?p=37067#comment-456991 Is there nothing you can't fix? Good job on the repair Parasuraman.

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]]> By: Albert van Bemmelen https://jestineyong.com/dull-display-problem-solved-in-amigo-patient-monitor-model-mm1121/comment-page-1/#comment-456988 Sat, 28 Mar 2026 16:48:11 +0000 https://jestineyong.com/?p=37067#comment-456988 In reply to Parasuraman S.

Sorry but that new led driver board you used to replace the bad led driver board is still not showing in any photo apparently.

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]]> By: Yogesh Panchal https://jestineyong.com/dull-display-problem-solved-in-amigo-patient-monitor-model-mm1121/comment-page-1/#comment-456985 Sat, 28 Mar 2026 10:55:51 +0000 https://jestineyong.com/?p=37067#comment-456985 Good Repair!Sir
sadly IC is not available easily.

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]]> By: Parasuraman S https://jestineyong.com/dull-display-problem-solved-in-amigo-patient-monitor-model-mm1121/comment-page-1/#comment-456983 Sat, 28 Mar 2026 10:14:11 +0000 https://jestineyong.com/?p=37067#comment-456983 In reply to Albert van Bemmelen.

Many thanks for your expert comments and suggestions, dear Albert! The photos are given under the third paragraph, which comes after an advertisement. Kindly try zooming!

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]]> By: Albert van Bemmelen https://jestineyong.com/dull-display-problem-solved-in-amigo-patient-monitor-model-mm1121/comment-page-1/#comment-456981 Sat, 28 Mar 2026 08:00:29 +0000 https://jestineyong.com/?p=37067#comment-456981 After reading your excellent repair I sadly missed the photo or detailed info showing the mentioned led driver board that you had new from one in your stock.

The hospital monitors they use look like fine 4:3 screen format monitors. Those also would be excellent for connecting to retro-computers like the Commodore C64/128, Amiga or ZX-Spectrum depending on what video input ports they have. If they have 9 or 15 pin VGA input ports, or maybe SCART input too, that would be a direct perfect match!
I mention this because those old 4:3 crt monitors for retro computer users are no longer made and new led monitors now mostly are only in the 16:9 screen format.

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