CRT Repair vs LCD Upgrade: The 5-Year Cost Truth

Bottom line: A FANUC 0-TC CRT needed 4 repairs in 18 months totaling $1,850. An LCD retrofit costs $179-600 once, lasting 50,000+ hours. Based on Kongto Technology service records and published case studies.

CRT Failure Breakdown (500+ service records)

Flyback transformer failure: ~40%
Capacitor aging: ~25%
CRT tube wear/dimming: ~20%
Deflection circuit: ~10%
Signal connector: ~5%

Case 1: FANUC 0-TC, 4 Repairs in 18 Months

Timeline	Fault	Cost	Downtime
Month 0	Flyback fail, black screen	$400	3 days
Month 8	Flickering	$350	2 days
Month 14	Dim display	$600	4 days
Month 18	Black screen → LCD upgrade	$250	30 min

18-month total: $1,850 + 9 days downtime (~$5,400). LCD: $250, zero subsequent repairs.

Case 2: Mitsubishi M64 Fleet, 5-Year TCO

3 machines, MDT962B CRTs: Used CRT route ~$43,710 (incl downtime) vs LCD retrofit $480. Savings: 98.9%.

Brand Cost Quick Reference

Model	OEM CRT	LCD Retrofit	Savings
FANUC A61L-0001-0093	$800-1,500	$179-299	~77%
Mitsubishi MDT962B	$600-1,200	$160-299	~70%
Siemens 840D 6FC3988	€800-1,500	$299-500	~70%

References

Repair vs Replace: Real Cost, dev.to/szkongto, 2026
Mitsubishi CRT vs LCD Retrofit, dev.to/szkongto, 2026
FANUC A61L-0001-0093 CRT Dim Display Case Study, dev.to/szkongto, 2026
Kongto Technology service records (500+ enterprise customers, 2013-2026)