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History of 5150/5155/5160/5170 Motherboard Failure
at the Vintage Computer Forums


Link to Vintage Computer Forums is here.

Date
Thread#Post
User
Motherboard
Cause
Comment
OCT06
4573
the xt guy
5150
Faulty RAM
 
NOV06
5323
mR_Slug
5160
Tantalum cap
 C56
JAN08
9601
dkedrowitsch
5170
Faulty BIOS ROM
 Offline, determined that his 61X9265 EPROM had corrupted contents
MAR08
10510
crazypigeon
5150
Tantalum cap
 C6
 
10510#11
flavio75
5160
Tantalum cap
 
MAY08
10510#30
vwestlife
5150
Tantalum cap
 C7
MAY08
10961
dongfeng
5150
Faulty RAM
 
JAN09
12538
Luke
5160
Tantalum cap
 C58
MAR09
10961#12
tezza
5150
Faulty RAM
 Last worked okay a few months previously
MAR10
19696
rtwo
5155
Faulty BIOS ROM
 U19
JAN11
25230
Denniske1976
5160
Tantalum cap
 C56
FEB11
24042#1
mikey99
5150
Faulty RAM
 One 4116 chip (16K-64K board).
MAR11
24223
framer
5150
Faulty BIOS ROM
 U33
MAR11
23864#17
zoomgofstr
5155
Faulty RAM
 
MAY11
25196
redhawk579
5160
Tantalum cap
 C56
AUG11
26693#8
bettablue
5150
Tantalum cap
 Multiple
DEC11
24042#8
mikey99
5150
Faulty RAM
 One 4116 chip. Same motherboard that failed in February.
MAY12
30371
DOS lives on
5170
Faulty RAM
 Type 1 motherboard. One chip in bank 0.
MAY12
30521
CannedBread
5155
Tantalum cap
 C58        (plus tantalum cap C8 on CGA card)
JUN12
31172
latvija13
5155
2 x tantalum caps
 C56 and C58
SEP12
32659
marcoguy
5160
RAM
 No longer seeing RAM above 128KB. Fix: Reseated RAM chips
OCT12
34083
madmaxamdam
5160
2 x tantalum caps
 C56 and C58



Some of my own motherboard repairs (the ones that I have an email record of).
All motherboards had a 'dead / no display' symptom.

Date
Motherboard
Cause
Comment
NOV08
5150
Faulty RAM chip
 16K-64K board
NOV08
5170
Faulty RAM chip
 
AUG09
5150
Faulty 74LS138 chip
 Thermal. Chip worked when cold.
JAN10
5150
2 x tantalum caps plus 3 x RAM chips
 
FEB10
5160
RAM delay line