Steam Deck Mainboard Testing Points

Steam Deck Mainboard Testing Points
Type
Device(s)	Steam Deck
Difficulty

Testing Points of the Steam Deck Mainboard are shown in Figure 1. Values are shown in Table 1. Testing points are divided by sectors ("Position"). Measurements were done with a VC99 (Aliexpress clone) Multimeter. Measurements in diode mode were done with the positive terminal of the multimeter connected to ground of the mainboard (housing of the battery connector) and the probe was connected to the COM terminal of the multimeter. Resistance measurements were done in regular configuration.

Table 1: Testing points on the Steam Deck Mainboard (LCD, revision G, front). **GND**: connected to ground (0 Ohms/0 Volts), OL: Open Line (no resistance/voltage measurable).
Type	#	Side	Position	Diode Mode [V]	Resistance to Ground [Ohms]
Testing Point	01	Front	F1	0.277	3300
Testing Point	02	Front	F1	0.06	90.9
Testing Point	01	Front	F2	0.06	90.9
Testing Point	02	Front	F2	GND	GND
Testing Point	01	Front	F3	OL	OL
Testing Point	02	Front	F3	0.66	100000
Testing Point	03	Front	F3	0.65	100000
Testing Point	04	Front	F3	OL	OL
Testing Point	05	Front	F3	0.65	100000
Testing Point	01	Front	F4	0.55	277000
Testing Point	02	Front	F4	0.392	21000
Testing Point	03	Front	F4	0.422	80000
Testing Point	04	Front	F4	0.692	39000
Testing Point	05	Front	F4	0.545	23000
Testing Point	06	Front	F4	0.742	17000
Testing Point	07	Front	F4	GND	GND
Testing Point	08	Front	F4	GND	GND
Testing Point	01	Front	E1	0.585	OL
Testing Point	02	Front	E1	0.5	2588
Testing Point	03	Front	E1	0.85	158600
Testing Point	04	Front	E1	0.73	24500000
Testing Point	05	Front	E1	0.85	24500000
Testing Point	06	Front	E1	0.85	658000
Testing Point	07	Front	E1	0.82	9380
Testing Point	08	Front	E1	0.345	529
Testing Point	09	Front	E1	GND	GND
Testing Point	10	Front	E1	0.277	3300
Testing Point	11	Front	E1	0.477	6430
Testing Point	01	Front	D1	GND	GND
Testing Point	02	Front	D1	0.48	9520
Testing Point	03	Front	D1	GND	GND
Testing Point	04	Front	D1	0.48	64500
Testing Point	05	Front	D1	0.365	1221
Testing Point	06	Front	D1	0.48	19980
Testing Point	07	Front	D1	0.38	1188
Testing Point	08	Front	D1	0.827	71000
Testing Point	09	Front	D1	0.363	1222
Testing Point	10	Front	D1	0.48	19700
Testing Point	11	Front	D1	0.477	19800
Testing Point	12	Front	D1	0.38	1190
Testing Point	13	Front	D1	0.755	978000
Testing Point	14	Front	D1	0.8	5800000
Testing Point	15	Front	D1	0.8	2300000
Testing Point	16	Front	D1	0.755	10000000
Testing Point	17	Front	D1	0.466	2060
Testing Point	18	Front	D1	0.48	24000
Testing Point	19	Front	D1	GND	GND
Testing Point	20	Front	D1	0.48	24000
Testing Point	21	Front	D1	0.545	10900
Testing Point	22	Front	D1	0.454	22000
Testing Point	23	Front	D1	0.728	69000
Testing Point	24	Front	D1	0.847	29200
Testing Point	01	Front	D2	0.847	29480
Testing Point	01	Front	D3	0.033	17
Testing Point	02	Front	D3	0.033	19.6
Testing Point	03	Front	D3	0.461	2655
Testing Point	04	Front	D3	0.458	2637
Testing Point	05	Front	D3	0.053	24
Testing Point	01	Front	D4	0.458	2614
Testing Point	02	Front	D4	0.118	358
Testing Point	01	Front	C1	0.428	22700
Testing Point	02	Front	C1	0.428	23000
Testing Point	03	Front	C1	0.428	30000
Testing Point	04	Front	C1	0.6	OL
Testing Point	05	Front	C1	0.545	623000
Testing Point	06	Front	C1	0.425	5836
Testing Point	07	Front	C1	0.6	3700000
Testing Point	08	Front	C1	GND	GND
Testing Point	09	Front	C1	0.55	10990
Testing Point	10	Front	C1	GND	GND
Testing Point	01	Front	C2	0.031	15.4
Testing Point	02	Front	C2	0.848	29460
Testing Point	03	Front	C2	0.56	19000
Testing Point	04	Front	C2	0.474	14610
Testing Point	05	Front	C2	0.56	19730
Testing Point	06	Front	C2	0.474	14780
Testing Point	07	Front	C2	0.442	400000
Testing Point	08	Front	C2	0.474	14780
Testing Point	09	Front	C2	GND	GND
Testing Point	10	Front	C2	0.052	24.7
Testing Point	11	Front	C2	GND	GND
Testing Point	12	Front	C2	0.55	12350
Testing Point	01	Front	C3	0.03	17.6
Testing Point	02	Front	C3	0.03	17.4
Testing Point	03	Front	C3	0.052	24.9
Testing Point	04	Front	C3	0.651	10000000
Testing Point	05	Front	C3	0.01	0.7
Testing Point	06	Front	C3	0.647	20000000
Testing Point	01	Front	C4	GND	GND
Testing Point	02	Front	C4	0.378	11300
Testing Point	03	Front	C4	0.378	11240
Testing Point	04	Front	C4	GND	GND
Testing Point	05	Front	C4	0.118	347.3
Testing Point	01	Front	B1	0.735	83000
Testing Point	02	Front	B1	0.395	20000
Testing Point	01	Front	B2	GND	GND
Testing Point	02	Front	B2	0.595	1172
Testing Point	03	Front	B2	0.382	10930
Testing Point	04	Front	B2	0.24	1600
Testing Point	05	Front	B2	0.585	62000
Testing Point	06	Front	B2	0.585	62000
Testing Point	07	Front	B2	0.512	200000
Testing Point	08	Front	B2	0.389	9120
Testing Point	09	Front	B2	0.832	22350
Testing Point	10	Front	B2	0.832	22350
Testing Point	11	Front	B2	0.475	19820
Testing Point	12	Front	B2	0.277	3350
Testing Point	01	Front	B3	0.392	20000
Testing Point	02	Front	B3	0.63	32000
Testing Point	03	Front	B3	GND	GND
Testing Point	01	Front	B4	0.647	OL
Testing Point	02	Front	B4	0.422	82000
Testing Point	03	Front	B4	GND	GND
Testing Point	04	Front	B4	0.548	278000
Testing Point	05	Front	B4	GND	GND
Testing Point	06	Front	B4	0.6	730000
Testing Point	07	Front	B4	0.362	200000
Testing Point	08	Front	B4	0.6	12000000
Testing Point	09	Front	B4	0.43	105500
Testing Point	01	Front	A1	GND	GND
Testing Point	02	Front	A1	0.54	11800
Testing Point	03	Front	A1	0.4	20420
Testing Point	04	Front	A1	0.4	20370
Testing Point	05	Front	A1	0.424	5800
Testing Point	01	Front	A2	GND	GND
Testing Point	02	Front	A2	0.528	970000
Testing Point	03	Front	A2	0.548	OL
Testing Point	04	Front	A2	0.765	19600
Testing Point	05	Front	A2	0.564	29200
Testing Point	06	Front	A2	0.392	14280
Testing Point	07	Front	A2	0.535	15300
Testing Point	01	Front	A3	GND	GND
Testing Point	02	Front	A3	0.645	OL
Testing Point	01	Front	A4	0.422	82000
Testing Point	02	Front	A4	GND	GND
Testing Point	03	Front	A4	GND	GND
Testing Point	04	Front	A4	0.416	16000
Testing Point	05	Front	A4	0.516	3000000
Testing Point	06	Front	A4	0.42	82000
Testing Point	07	Front	A4	0.39	16250